Kimber, Signal or Blue Jeans?

It's not going to be possible to get a definitive answer so maybe the best approach would be to buy the Signal cables if they're at a great price and try them. Then, keep your eye out for a deal on something else you think might work, buy it and compare the two.

If you're smart about buying and you stick with well-thought-of brands you can always flip them and often not be out much more than the cost of shipping. A lot of great systems here are built that way, bargain hunting to get incremental improvements, real or perceived.

I agree the Signal Cable sounds like a great deal.

If you want to spend a little time discovering whether speaker cables in that price range can make a difference in your system you could also get 16 feet of Canare 4S11 from markertek.com and just connect it bare wire for testing. It's really good cable, used by a number of cable vendors, and only $1.29 a foot, meaning 16' of it would set you back $21 plus shipping.