One quick note about overclocking:

Your phone does not run at max speed all the time. It will spend most of its time in a sleeping state at minimum speed (or in some states, partially off) and only jumps to maximum when loaded.

Also, overclocking will cause a slow increase in errors (not sudden failure) over time due to electron migration. While this may take a while to happen, it'll mostly reveal itself in strange, unreproducible errors. Others who have since reduced their posting due to the poor atmosphere could explain it better than I, but them's the breaks.