The 4300 certainly isn't for everyone. For that price, it was exactly what I was looking for to upgrade from my pioneer elite 501. 9ch amped (11 processed); full pre-outs, allowing for future amplification; Audysey EQ; decent power output; solid components.
What really convinced me to look to the Denon was a semi-scientific listening test I did in BB Magnolia, pitting the 4300 against an equivalent AVR I was considering. I set both to Pure Direct mode and, using an SPL meter and pink noise from my Hsu test disk, adjusted the gain of both to 70db at the LP. Using the same speaker in 2-ch, I listened to the same 4 samples on each (female voices and very demanding classical pieces) and picked out the Denon three times out of the 4 for clarity. The fourth was indeterminate - a tie. The Magnolia guy randomly switched AVRs between samples so it was blind to me but not a double blind test. It was enough to convince me.