If I were not a Mac person, I could comment on various Windows-machine computer deals with some sort of authority. But I am so I can’t. The best I can do is find some reviews for you and let you make up your own mind.
That said, right now Amazon has the Samsung ATIV Smart PC 500T available for $635—already on the low end of prices I’m seeing—with a bonus $100 Amazon gift card with purchase. This machine is one of those combo tablet-keyboard-kind-of-a-laptop-but-not-really doohickies (technical term). You can check out the PCWorld review for more information; the editors only gave it a 3 out of 5 stars, but if you check out the comments, a lot of users disagree with that.
I think the whole concept is a little weird, personally, but if for some reason this is the machine you want, it’s the best deal I’ve seen.