I have had a lot of problem with getting the right fit for years, doesn't help that one foot is longer then the other either. I usually ended up going through a cheep pair of hiking boots every year. I finally made a switch to shoes earlier this year. I tried on at least 15 different pairs at different retailers. I then tried a few pair online through retailers that offered free shipping both ways. Some sites even have shoe fitter charts to help get the right fit. Ended up with a pair of Montrail AT Plus shoes. Really hard to spend $110 on a pair of shoes but my feet have no complaints. What ever you choose, it pays to shop around. Good luck...

http://www.runningwarehouse.com/descpageMRS-MNATPM.html