I'm currently running shimano m 520 pedals on my Trek. Unfortunately, this is my only set of clip ins and I must swap them between my Trek and Specialized MTB. It's not a big deal, it just worries me I'm going to strip out the crank arm threads. So what I need from you people is some feedback on the different spd style pedals. USAZorro recommended the A-520 but, before I drop any money I'd like to hear so other feedback. The M-520s tend to give me a bit of a hotspot but, that could be the shoes (specialized MTB shoes) and I have a different pair of "touring" shoes that I plan to use strictly for road use. Lets here some opinions