Well, like for most of the AV equipment, it's all a matter of taste. Many people like the Denon sound, other like the Yamaha/Pioneer sound.
I had the Denon 3806 receiver and liked it but I must admit that the Yamaha sound fits me better now.
In my opinion, the most important is to listen before buying!
As long as you like what you buy and it fits your taste then you're good!
