I have two polk systems in da house, one in the family room and one downstairs in the kids recroom. I am very satisfied with their sound for both music and home theater. They offer alot of bang for the buck. You're probably aware that Polk is in the process of replacing their RTi line with a new line, so you can pick up on some great close-out prices on the RTi line right now.
What's you budget? Are you looking at towers or bookshelves?