Warm, flexible, cheap-ish cables?

I recently went through the same search.  Ultimately bought Audio Art  Copper Cryo speaker cables with upgraded ETI Copper spades.  Also bought the AAC D1-SE2 digital cable ( check out review on Audio Bacon) They are outstanding!  Believe me they out performed multiple other brands which were more expensive.

Rob Fritz ( owner/ creator ) is great to work with as well.

Mid range Wire World is particularly warm, and if that's still not warm enough try mid to low end Monster cable which is particularly dark.

Mogami.

For speaker wire, the analysis plus 12 gauge blacks are awesome and you can get a deal from a dealer for around 300 for a pair.  They are warm while still allowing high end detail to shine through.

I wouldn't be opposed to mixing manufacturers cables if I was you.  In my experience, interconnects are way less impactful to a system than other cabling.  I still rock mogami for mine after comparing to others and not feeling it was worth it.

Best of luck to you!  If you can find a hifi dealer that will let you borrow cabling, this is by far the best way for you to decide what works well in YOUR system

For speaker cables I recommend the Canare 4S11 speaker cables.  For around $100.00 you will get a fairly neutral cable that sounds amazing.  I switched from expensive cables to these 5 or so years ago and never looked back.  Break in is long, around 500 hours but everything is there in spades, thunderous bass, smooth midrange and a very delicate treble.  I did a long thread on the cables and breaking them in,   I loved them so much, I use them in both my systems now.