I'd advise against getting any case which has the PSU mounted in the top for two reasons - it results in hot air being drawn into the PSU, and generally "wiring" the PC neatly is more difficult. Also, one with a a partially removable HDD cage would be good, in case you want to fit a long GPU.
Personally, I've got a soft spot for the Fractal Design cases - I have their Define R4 (since superseded by the R5), with 3x 140mm intake fans, which pull in a lot of air, whilst remaining quiet. The Define is a bit expensive, and is available with or without a window. The Core series is a bit more "plastic", but is half the price ...