All 4 receivers have pre-outs for adding a power amp later and ethernet so you can download those firmware updates as needed. I have liked Denon better than Yamaha, but that was before the Adventage series. Those look very nice but I haven't had a chance to play with them yet.
The Monitor 11's are SWEET! You will love them. My only thought is that for a room that size they might be a little big, but if you are going to keep them awhile, perhaps you will have a larger room later.
I would probably go with the 3311 and use the savings over the A2000 for a center channel. Depending on how much room you have in your A/V center, the CC-290 - $549 - should fit well with the Monitor 11's. It weighs about 30 lbs. The CC-390 is mammoth! It is almost like a Monitor 9 on its side and weighs over 50 lbs, so that could be a challenge to mount.