Budget cables I have used in past with good results are canare 4s11, mogami, speltz anti cables, audioquest type 4, and now have morrow sp4. All but the morrow sp4's cost me less than $80. Of course this all depends on your budget and desired results but I found that all of the cables I mentioned to sound better the cheap wires. Other may disagree.
Speaker cable for Nad 7050 and KEF LS50
I've been using cheap speaker cables to connect my LS50s to my NAD D7050 and they sound great for my uneducated ears. I have never really invested in cables, but I was wondering if anyone can recommend/suggest any (not very expensive) cables that could make a difference.