I'm pretty new, too. So take my recommendations with a huge grain of salt.
I have your same DVD player, too. I started with the 3802, because on clearance, it had the most features and power I could find for the money.
I was not pleased with it's sound on 2 channel, not bad, but not blowing my socks off. I am pleased with its performance with movies.
So I asked some advice, and ended up buying a 2 channel DNA-1 amp which had 185 watts (vs 110 watts for the AVR). I use the pre-outs from the AVR to my amp for the fronts (Paradigm 100v.2) This gives me a much cleaner and louder sound for two channel. In addition, it frees up some power for the 3802.
The rears and center sound better since no AVR power is sent to the fronts.
My next purchase will be a two-channel preamp which will take over the two channel duties completely from the 3802. With the HT pass through option, which neutralizes the preamp, I can still use the Denon as processor for movies for all 7 speakers (the front two being powered by the DNA amp.)
I guess what I'm trying to asy is that for the money, I
can get by with the 3802 for movies, and really invest in a killer 2 channel system that I can integrate.
I hope this helps.
