In my opinion,
A: too flat, key placement
B: windows keys, bad return key placement as well as the arrows and pg up/down
C: looks the same as B but cheaper
D: again the cramped key placement, but I like the glow in the dark
my conclusion, get A. I would like to try it out first but based on looks I think its the best. maybe someone can explain to me why every one of these keyboards had to screw up the key placement.