Thanks guys, I think the point has been made. So I'm going to skip the new receiver and focus on replacing my 3 front speakers.
I haven't been very happy with the way music sounds, like it's lacking mids, not a crisp sound... also, the bluray movies coming from the PS3 sound just OK, it feels like movies from premium movie channels like HBO and Showtime sound better. And the PS3 is configured appropriately. I did run Audissey on the Onkyo several times.
Anyways, I'm totally ignorant about what's out there and what's good value as far as replacement speakers to be able to hear a good improvement in sound quality. BSA suggested replacing my current Infinitys with another set of Infinitys... would that help me much?
By the way, my living room is small so I don't need a whole lot of power, but I want quality