I must be the only jackass who somehow missed out on the snowspeeder, so I would love to have that reissued. I would say that would be my number one want. I also agree on the Octapurra droid...I really like that thing. I've always been keen on giant killing machines though. In that same vein, I think the AT-ST should have a reissue as well.
2. Octapurra droid
4. Homing Spider droid
5. Tank droid
6. Dewback (not really a vehicle, but it could fit in that line)
7. Hailfire droid