These seem to be getting more and more popular on campus and around here. I guess it's because Flroida has so few hills, you can just roll down a flat sidewalk forever with a longboard. My only experience with longboards are Sector 9 boards, which are damn good. I think the boards with the deck higher off the ground tend to go hella faster on hills.
As far as your selections, I'd pick the last one. A shorter board can probably be handled better, especially on sharper turns. Plus it's just that much less board to lug into class each day. PLUS the design is rad, IMO.