Would a 4850 handle it with a quad core processor? Will I get atleast 30 fps with 1360X768 ?
You will probably get beyond 120fps with full tilt settings. Considering how much more powerful your GPU and CPU it is given unless they dont care about optimisations which would be strange considering it was supposedly running at 60fps some year(s) ago on a PC and with what seems better IQ compared to recent released media.
Also a developer from ID said a dual-core was enough (I think the quote is in this thread).
EDIT: Above your post...