I'm trying to decide between a Radeon HD 7970 and a GTX 670 right now. I'm leaning towards a 7970. Is the HIS version of this graphics card a good version? Is it worth the $390.00 (current New Egg price)? If not, or even if so, what is a better version of the 7970 (below $400.00 please). Thank you ahead of time!