Thanks for the replies.

tomtuttle- I am using the Axiom EP350...no complaints at all about the bass. Let me check my understanding of something...with a powered subwoofer like the EP350, the receiver really doesn't do anything other than allocate the correct frequencies to the sub and send the signal? A "more powerful" receiver won't make the bass any better on a powered sub, right?

I guess I shouldn't have used the term "more powerful"...what I really meant was "higher quality." I didn't know if I would hear a huge difference in sound quality from the AVR-1910 vs the 2310...I thought there might be some, but I didn't know if it would be $300 worth of difference!