What speaker cables can complete with Audience 24e or 24e SE for less $$

Hi Jim,
Go to ebay and search for "WE 10ga wire"
Find wire offered by tajacobs, which is still available in various lengths for less than $4/foot.
This wire already comes as a twisted pair and provides a full 10 awg to each pole.
The twisted pair is fairly small in diameter and is quite flexible. The wire is stranded, tinned copper that you can connect directly to your binding posts, without connectors, or you can add your choice of soldered or crimped spades or bananas.
If you need a visual upgrade, simply put the pair inside 3/8-inch  techflex and finish with a piece of heat shrink at each end.
I run two twisted pairs of this wire to each speaker in a bi-wire configuration.  I occasionally compare this wire with other double-run, bi-wire cables I also own, which include Furutech's OCC stranded cables, the same OCC HT Pro-11+ (and Pro 9+) solid core cables that you currently have, DYI solid core copper in cotton cables, and Homegrown Audio's X-32 solid core sliver cables. Each time I do this, the WE wire remains in my system after the comparison.
Some folks dis this stuff as not being a serious cable since it is not boutique, doesn't cost much and wasn't designed as an audiophile-specific product....how could it possibly sound as good as something costing $1K or more?  IMO it does nothing wrong, provides an even-handed presentation without being hot on top or too loose/boomy in the bass, while offering perhaps the most tonally musical midrange I have heard from a cable.
Give it a try...what do you have to loose?  Just buy the cable and hook it up before you spend time adding connectors or tech flex.  I suspect will be pleasantly surprised and not just "for the money."

If you really want an economic solution for small diameter, flexible cables that would sound great with your speakers, three options come to mind.

Your HT Pro 11+ cables are IMO pretty good sounding.  They are made from multiple, bundled, small gauge, solid-core copper wires that are individually insulated with PE (which I believe sounds better than Teflon).  The bundles are encased in plastic and interwoven with damping materials.  This whole business is then covered with a flexible rubbery type covering which is then covered with a thick PVC outer casing and then covered with Techflex.  Your problem with size is that there is a lot of "stuff" surrounding the wires themselves and I particularly do not like the thick PVC outer covering.  If you really like t sound of the HT Pro 11+ cables with your speakers, one option would be to carefully remove the outer casings and damping materials, and then place the twisted pair of encased conductors inside of black Clean-Cut Techflex with a piece of heatshrink at each end.  Your favorite cables would then be much smaller in diameter and very flexible.  I have removed the coverings on several HT cables to harvest the wire and while you need to be careful and use very sharp/new blades, and pulling the coverings apart takes some strength, you can do this without damaging the cables.  Your cost for this option would be Techflex and heat shrink. Parts Express is a convenient source for economical Techflex and heat shrink to finish your cables at a cost of around $20 or less. 

I find the discussion of BlueJeans cables interesting in that they simply use easily available Belden or Canare bulk cables and terminate them for folks that are uncomfortable doing so.  The Canare 4S11 cable uses annealed, 14 awg stranded copper conductors in irradiated PE insulation that can be cross-connected so that each pair creates an 11 awg conductor, the same as your HT cables.  The cross-connected geometry reduces inductance, which is beneficial for speaker cables and power cords.  They are flexible and a single run to each speaker should be all you need for your single-wired speakers.    I don't like the spades offered by Parts Express (because they are brass) but Sonic Craft or Partsconnexion each have better solid copper spades or bananas as well as the Techflex and heat shrink. Markertek offers the 4S11 wire for $1.35/ft.  If you need two 6-foot cables, that is a whopping $16.20 for wire plus maybe $30 for Techflex, heat shrink and spades, so your total cost is around $50.

Another option is back to the WE 10 awg wire I mentioned below.  On e-bay, there is right now a per-foot option (for a twisted pair at 10 awg per wire) at $3.95 per foot or a 16-foot length for $60, both being sold by tajacobs.  There is a well-known American cable maker that has received excellent reviews for their speaker cables and power cords, which I believe are made from this very wire.  If you need 12 feet of the wire, for two 6-foot cables your wire cost would be about $48, or buy the 16-foot length and cut it in half for two 8 feet long cables..  To finish them off, add $30 for coverings and spades so you are at about $80 for wire that has received rave reviews.    

If you want to spend more money on AU 24 cables then go ahead.  You will not have to construct anything and you can always sell them if you don't like them.   But if a lower-cost option is desired, then consider the three options above.  My sonic preference would be the first or third options.  With options 2 and 3, you may actually save money by selling your HT cables and using the proceeds to fund your new speaker cables. Good luck and let us know how your choice compares to your HT cables.