The GTX295 is a pain to mount a block too. Too many screws and too many spots that need thermal tape. I do like that EK block though. It is such a nice looking block.

I was thinking about putting the single slot brackets on mine too, but you have the LED and also that thing weighs a ton with the waterblock on it. I liked the idea of the larger bracket supporting that beast.

Nice choice though, I bet that thing is going to fly.