Say you have my currents setup. What do you upgrade??

[mario_capo]

Take a look at my sig and tell me if you were me with not a giant budget but an everlasting itch to upgrade, what you would upgrade first. Basically I mean the receiver or the front sound stage?? What's gonna give me the biggest difference? If I upgrade to an HD Audio Onkyo receiver or upgrade to some tower fronts and a new Center Channel??? I was loving the Polks at Fry's. They had the TSI400's there that sounded slightly better than the Infinity Primus P252's I originally was demoing. The salesman was pushing JBL balboa 30's on me! He said they sound better and usually are 300 a piece discounted to 90 bucks. To me they didn't sound anything special. But those Polks were nice! I dunno what single upgrade would benefit me most. I want to keep the infinity sub I have and the rears. I also might keep the 2 fronts and move em for a 7.1 setup. Not really too sure about that one though. Small living room. Any insight would be greatly appreciated! If I get those towers I would probably start listening to more music the techno stuff they were playing there sounded fricken awesome. I will probably upgrade it all eventually just don't have the funds at the moment.