I manage a large tire/auto shop and based on what you are after go with the Michelin Defender LTX MS in the stock size, highly highly recommend that if you want a really solid all season that is quiet and will last.
If you want something a little more aggressive...
1. Nitto Terra Grappler G2 - Still a P metric so you would won't kill mileage and seem to be one of the quieter all terrain options.
2. Falken Wildpeak AT3W - Same deal as the Nitto, have had a lot good feed back on it.
Some other all terrains I'd look into would be the new Toyo Open Country AT3 or the General Grabber APT. I don't have enough/any experience with these yet - just based on the initial reviews have been.
But if you want quiet, comfort, longevity... basically the whole package. Go with the Michelin Defender.
Hope this helps.