Which model Polks. That seems very high. Couldn't even find Polk tower systems on Polk's web site for that much as they were well down in the $1200 range on their tower system - but didn't appear to be the current RTi.
NOTE: Polk price controls, so they should be the same everywhere. That said, I saw bookshelf RTi4, RTi6 centers and surrounds marked down yesterday at circuit city. I just think they are to industrial looking with the plastic gray borders on the grill....plus, the clamshell surrounds (don't get me started.)
While an earlier post noted the lower power of the HK 330, don't worry about it. HK for some unknown reason understates and appears non-competitive within it's class. HK measures on a continuous load, where others are 1 channel driven and they are not directly comparable.
With independent retailers (not big box stores) you should be able to negotiate prices on a complete set - and that includes Sound Advice - 10-20% off list. I would go to other's in your area. Do a dealer search off manfacturers web site (Paradigm, NHT, PSB etc) to find local dealer, audition, get competitive qoutes. Also, Best Buy (Athena) and Circuit City (Polk) have generous 30 day return policy without restocking. May want to do an in-home side by side etc. Also, Aperion and Axiom - both mailorder - have 30 day trials, but you have to pay return shipping.