Excellent review and forums just found this site doing research for my upgrade. I am in the middle of doing an upgrade for MB/GPU/PSU and was torn between which graphic cards to get mostly comparing 260 with the 4870 1GB. I kept leaning towards the 260 C216 55nm even though the price was about $50 higher then the 4870 I decided to order the evga superclock version. This review answered many questions I had and made the decision much easier.
I too was hoping for more O/C potential from the 55nm but the more silent fan alone is worth the little extra.
I am still hoping i can hit slightly over SSC clocks with it for 24/7 if so I will be happy
Now just playing the waiting game for my parts to arrive, looking forward to this jump from my 6600GT