That's a good combo. 650W is pushing it for two 6950s, though. It might handle it, but it's on the fringe. Also, 8GB of RAM is pretty standard these days on an x64 OS.
An SSD is really nice for loading applications and boot times, but 60GB is kinda small. I got a 60GB SDD (OCZ Agility 3) for the same purpose and it just isn't quite big enough. SSDs don't run as well when they're full so there should always be 5-10GB overhead and Windows is pretty big (even after all the tweaks) so it doesn't leave much room for games. You won't be unhappy with a 60GB SSD but after a few games it will leave you longing for 120GB.