thread yeah, each to their own, I mean I couldn't do 5km without being in huge pain
if you're running marathons up and down serious lumps 17 times a week then I doubt you have any need

hark at you and your correctly aligned soles
permalink I wouldn't go that far
I do overpronate a bit, which is why I use Brooks GTS Adrenalines for road running.

Doesn't seem to matter as much on trails, so have used all sorts of shoes. Although I probably do need a new pair of comfy long distance trail shoes. The Saucony Peregrines have ALL the grip, great for slippery winter trails, but not that comfy after a while
permalink Their Xodus shoes are pretty good
although the soles on my last pair didn't do too well on rocky/rooty trails. If you can find them, Dynafit do some excellent trail shoes. But try before you buy as they have some weird sizing issues.