Hello experts! I'm looking to do a budget upgrade on my surround speaker setup (just the center, L and R and rear surrounds, already have a good subwoofer) and am looking at the Polk Audio RM6750 set. I know it comes with a sub, but I can just tuck that away in a closet as a backup in case my present sub kicks it. Does anyone have any hands on with the RM6750 set? Is it a good deal, or can I do better? Trying to keep the cost under the 300.00 USD mark. Thanx!