So basically it is better than even SLI GTX 285 in some casses, as I see from bench Marks, and uses less power, in addition to the price it is cheaper. Anything to add, I am going with 5870 that is for sure. How about reliability durability?
That is a very good choice. As for durability and reliability- it uses less power and generally produces less heat- always a good thing for longevity. It's a high end card (even the mobility version) and should last you well and be very reliable.