I highly recommend Virtual Image interconnects, the Pile Driver 18. A few months ago, these replaced the Straightwire Crescendo's that I was using. You didn't really specify a price range, the V.I. interconnects will run you about $200 for a 4 ft. pair. I've also tried the Audience Au24's in my system and have found the V.I. cables to be superior to them as well. As for speaker cables, since you didn't specify a price range, try the DH Labs Q-10 speaker cables. I put these in my son's 2 channel system, but could not resist the urge to try them in mine, I was pretty impressed by them at their price point. Going up the ladder from them, I recommend Acoustic Zen Satori ( I put these in my wife's HT), and I use Kimber Select 3035's in my 2 channel.
