My boys are moving into their first home (seperate houses) and I am in the process of putting together a system for each. The first will be a polk setup with the following:

Fronts: Polk Rti 4
Center: Polk CSR or CS1 (still on the fence about purchase)
Rears: Polk T15
Sub: Polk SW110

Driven by Pioneer VSX 522K

2nd system

Driven by Pioneer Elite VSX 81TXS

Fronts: Optimus LX5
Center: Unknown at this time
Rears: Pioneer sats
Sub: Optimus PS100