DENON, they make an amazing range of products, ive listened to all three you listed at Whitby audio near toronto except the Yammy, it was at a hifi store in Kingston and the denon to me blew them all away. The guys there tried to push Marantz on me but my ears told me other wise.
I run all paradigm speakers, Studio 100's, Centre is the 570 rear is 470 and surrounds are adp 470. I dont even need a sub with the receiver and 100's but i do have one. paradigm pw2200.
thats was what i was going to do aswell. Just make sure that your speakers area ll the same size so they fire in sync, i think it was monitor 9s that had the same speaker size as the mini monitors. Im not 100% but it is always good to try and keep the actuall speakers the same size. 6 1/4" rings a bell as it is good to keep the same brand throughout..
Well when I had the preformance and monitor series (2 months ago, I upgraded very very fast) I used the Denon 1905.
But when I upgraded to the studio series, I bought the Rotel 1056. I did A/B blind tests with that receiver and the Denon 3805. And I could pick the Rotel over the Denon 90% of the time. And I watch movies and play video games with my HT system, rarely if ever listen to music. I got a B stock, from my paradigm dealer for $1100.
Rotel is not very popular in the states, but its all the rave over in Europe...
I have also auditioned the Denon 3805 and although it sounded fairly good, I was not impressed with its power. I also listened to Rotel(a bit too expensive), Yamaha RX-V650(Under powered), Marantz 5500(Quite good), Cambridge 540R and after much headscratching settled for the CA. Why? It performs as well in stereo mode as in multi-channel, it has a very natural sound, have more than enough power, has a small footprint, does not have many bells and whistles to distract and also presented excellent value for money!
BUT, once again, do not let our opinions sway you, let your ears decide!