1) i would be overclocking for crysis mainly, is it worth it?
Not really. On an X1950 you'll be very GPU-limited on Crysis - I doubt your CPU clock will make much difference.
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.