I use DH Labs T14 with good results, although I find it a bit light in the bass. Better if you bi-wire with this cable. I've also used this cable: http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=100-155&DID=7 in another system, also with very good results. 12 ga oxygen free 100 ft for $42.63... can't beat it.
I would also check out www.elementcable.com. I haven't tried them, but I've heard good things about them.
I would also check out www.elementcable.com. I haven't tried them, but I've heard good things about them.