I second the cat 5 idea.
look here: http://www.tnt-audio.com/clinica/triple_t_e.html
I've made these and they are a pain in the ass, but kind of fun hobby for a weekend.
Get the best cat-5 you can get (Belden 1585A CAT 5 Teflon coated or similar), it doesn't cost that much more compared to the investment of labor. Just buy a huge box of it from an online computer vendor. (I think for a 10' pair run you actually need 150ft of raw cable!)
The ones I made were fast and open with good detail and ok slam, great deal for the price.