So I'm finally ready to upgrade my receiver. I currently have a Sony STR-DE475...a few years old now, and from what I've read not a very good receiver. I am driving JBL N38's, an N-center, and some $40 on-sale Polk surrounds. Also just got my Panny 47wx52, so its definitely time for a receiver. I am looking around $500 and want all the new features that I can get so it will last me a few years. I have a spreadsheet with about 15 receivers on it and all their data, but I think I've decided to get as new a model as possible to ensure the best level of feature-packed-value available. I really like both the Denon 1803 and the upcoming Marantz sr4300. It seems both will have all the features I'm looking for (DD EX, dts ES, PLII, 6 ch, good overall clarity and some juice). From what I've read here I can expect some better, or warmer, sound from the Marantz but the waiting is torture! I've also been considering the h/k 225 (seems underpowered), refurb h/k 320, and the Onk TX-SR600. I've searched and searched but just can't decide. I could use some help from those in the know... I should also mention it will be used for 99% HT. also, in general, what kind of difference in sound quality can I expect compared to the Sony (its 70x5, i think, DD, dts capable)?