My top 5

1. United Jazz - best of the best
2. Fansproject Bruticus - is this not the most amazing third party toy avaliable?
3. Fansproject Ultra Magnus - a true honour for Ultra Magnus' fans (like me)
4. Seekers - Since buying Generations Thundercracker, I feel the toy is fantastic - Thrust, Dirge have all enhanced this experience.
5. United Tracks - is there a sexier figure out there?

Note worthy mentions....
Warpath - havent got him but looks great from reviews
Ratchet - cause he costs so much money...
Protector - in truck mode he really looks good
Grimlock - cause HD loves him