Well, out of 1-9, I dislike 2, 4, 5, 6, and 8.
2: the front grill looks very out-of-place
4, 5, 6, 8: the fans showing through the mesh looks cheap. 7 with the brushed metal makes it look a bit better. If the front fans were black/invisible, it would be better.
1: I really like the menacing look of those fans. Awesome.
3: again, that fan+border combo looks great, but the buttons and the display ruin the front, as does that blank space between the fans. Do those fans come in an 80mm variant? I'm usually anti-80mm, but off-centering an 80mm between the two 120s to make room for power/reset buttons would make sense here. Also, the contrasting rivets everywhere looks great. It reminds me a lot of the sideskirts/fender-flares/front lip/rear diffuser from this car:pic1