For you to want a tire to get 50,000 mi. isn't all that realistic. Stock original tires make good millage because they have the best life treatment. The vehicle is new for a good portion of there life. This means everything is tight, straight, and often driven much easier then it is for the life span of set #2-3 and so on.
I personally don't like goodyear but they do usually last a long time as far as tread is concerned. Problem is they separate and have no grip along the way.
If you want the BEST tire that will get the most millage, is surprisingly aggressive, and the best ride then the Michelin LTX AT2 is your ticket. It is the best tire but it isn't low in the price department.