Well no GTX460 for me, AMD/ATI brand loyalty and all. Would a 5830 be a better fit? I just don't want to run into any issues with FPS with all the settings maxed, and I'm not sure a single 5770 would do it for me.
For what it's worth games with tessellation are going to be coming out at an alarming rate. Even the GTX 460, 465 and HD 5830 for example struggle with maxing out Metro 2033 at 1280x720. So I'd say the 5830 is bare minimum for what you want to do.
It'd be nice if some OEM 5840's showed up with more ROPs, a la HD 4860.