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.
Good card and KFA2 are UK based (helps if you have any problems). I wouldn't say the 680 is a waste of money, just not a wise buy with the 670 performing so close to the 680 for far less poundages.