comments as follows:

1. nice and clean, very simple layout, i like it. but the inside corners are a tad pixelated.

2. dont like it at all, just doesn't work.. can't give reasons, is just a fealing.

3. is very nice, though i think the text needs to stand out more, maybe a more contrasting colour.

overall i think the first and second, depends on what style of site your going for. i am leaning towards the first one i think.