I'd be getting, in this order of preference, an OCZ Vector, Samsung 840 pro, OCZ Vertex 4, or Samsung 830. (Avoid the non-pro 840, it uses different NAND which isn't as reliable.)
For your price range, the Samsung 830 and Vertex 4 are going to be your best bets - both are equally reliable. The 830 is a tiny bit faster, but the Vertex 4 is cheaper, and the speed difference isn't noticeable, so I'd go for that.