Wow Jab . . . FMS Cable. That's it nirvana from wire. Didn't ask to see how close to the back and side walls he has his speakers. Or even if the are located far enough apart for where he is sitting. Just great to sell him expensive wire that will do little with his current set-up. Turn him off and lose another customer. No wonder hi-end is dead.
Gonglee3, buy a test disk from stereophile and a sound level meter from radioshack. Move your speakers away from the back wall until the best curve is obtained. Then with something like good pop or rock with a singer in the middle move the speakers apart until the center image starts to become diffuse. This will be pretty wide so tow them in if you are sitting close. Make sure that they are even and that both are playing the same level or you need to adjust balance. Listen to your music and then see if your staging is better. And don't think cable will make a bad system sound better. Good cable is for systems that are already hi end. If you are unhappy about wire check out Tara Labs or XLO . . . anything with copper stranded, teflon insulated wire, and good connectors.
Happy day,
Keith