Your decision should be your own, since it's a very subjective thing...

I haven't gotten any hard resets, except when I switched batteries. And I think that's because one of my batteries is 3 months old. But after I got it to make contact, no more hard resets.

I've only gotten lockups from 3rd party apps and hacks. The only one I can't resolve is when I copy/move a file using FileZ.

I don't know about you, but I could easy keep this phone for 3+ years.