Jeff, these 2 options you mention (dual GTX680s versus K5000+K20X) differ HUGELY in price. AFAIK, you can get a GTX680 4GB card for around $800. $1600 for dual, whereas the K5000 alone costs $2200 and the retail for a K20X is above $3000. Can you really compare a $1600 setup versus a $5200 setup? There must be a trade-off there somewhere, right?



