I was surprised to only get 12 weeks out of my Brooks Maximus XT 5.. but that seems to be about a common time frame for a pair of attack shoes. At $160 a pop I thought they would be lasting a bit longer :(
One tip I dont remember seeing on here anywhere for sore feet is, that there are many different ways to tie your shoe laces. I use combination of a "looped Lace Lock" and the "Army" method. I find it very comfy :)
http://www.fieggen.com/shoelace/armylacing.htm
http://www.fieggen.com/shoelace/locklacing.htm