Those things are nice; but for a 680i they just don't cut it.
I went for the Ultra 120 eXtreme and two HR-05 SLI's.
Having the HR-05 on my SB prevents me from actually doing SLI thanks to the rediculous size of GPU'd these days, but my comp is now silent and very cool (not to mention heavy).
I did consider water cooling but unless you're spending over £150 on it, you're better off with heatsinks and fans. Its something to look at in the future in case the only way of actually getting a better GPU is to SLI it. *Cough*9800's....*cough*