There are very selected games that offer physx support.
I noticed the difference while playing Batman AA. But I only went for physx cox I had 260 lying around and resale would have been lower than I want. Right now, I won't recommend physx card, unless you get a 260gtx for 50-60$.
I use gaskets on all my fans.
But I make my own gaskets. Get plati dip liquid electric tape from your hardware store and put 3-4 layer on the fan body with a thin paint brush. Works like charm.
Very easy to come off in case you want to remove it and works just like gasket. Cheap, easy to use...
When I had H50, I noticed that very high rpm fan doesn't effect the temps, it just increased the noise.
I went for Yate Loon 120mm fans in push pool config. They are quite and gave me the best temp.
I also tried Antec trispeed fans. They are also very effective.
I think the setup is perfect. The pump will give you an option in future in case you want to cool your graphics card.
I'm also going for the same res soon, love it.
Great info. I went for 580 with 260 physx rather than amd. I'm running dual display and they work perfectly.
I would have gone amd if I was going for 3 display.