Re: Best Graphic Card for the money...and size issues
^ it has not been added to the list, yet, but it would be right below the 4870/GTX 260 C216.
the 4870 does outperform the 5770 but not in all games and the 4890 is a good bit faster than it. IMO i would still have gotten the 5770 over the 4890, mainly for DX 11 and a cooler running GPU. which will be a concern of yours especially in that case.
and waffle hammer is right, a good quality 500w PSU is able to provide cleaner power to the components, vs a cheap 700w PSU. but since it is powering 2 x1950's you should be good.