Thanks for the replies. I am still somewhat of a novice as far as these receiver terminologies go.
it does seem like most of these current-gen receivers have 32-bit DAC processors. The Denon has it, the pioneer elite has it, the Yamaha and Onkyo have it, and so forth.
My question then, I guess, is how important is the al32 technology the overall listening experience?
Secondly, will a person really notice a difference in sound quality between the 4500 and in the 3500 in the real world? (I will be using Polk lsi speakers, or something similar)
Finally, is there a significant difference in sound quality processing between the brands and models, if they were used as a preamp along with a dedicated Power amp?
I'm trying to understand some of the sound quality differences between the Denon 3500, the Denon 4500, and some receivers like the Pioneer elite lx503, and Onkyos and Yamahas in the same price range.
ideally I would like to be able to keep this receiver, whatever I buy, and eventually use it alongside a dedicated power amp. Unless receiver tech changes radically in the next 3 to 5 years...