After mulling this over I have decided to go ahead and get a 4810 instead of waiting for the 4311.
The 4810 has what I'm looking for and is available NOW.
A big plus also is I can get the 4810 for the price of the 4311 (out the door) from an authorized Denon dealer.
What makes the 4810 appealing to me is it has the COMPLETE audyssey DSX processing (something that really separates this from all the other choices) and better build quality than the 4311.
Since I will be using the 4810 as a main zone only, I don't have to deal with the zone assignment issues as this seems to be one of the major drawbacks of this model.
The only other thing that concerns me of course is this dreaded NIC problem. I'm guessing this comes down to the luck of the draw. You either get a good one or don't, so I just have to take my chances.
Since the 4311 hasn't even been released yet, it is hard to say whether it will have any NIC issues like the 4810 or not. The 4311 seems like it will be a nice unit but I don't think I will be happy without the full processing capabilities of the 4810.
All in all I think I'm making the right choice considering what I want this unit to do.