Can't think of any 'mechs I really want done, but the Zugvogel(usable by everyone) needs sculpting.
I assume you probably don't want to fund even a very cool-looking Industrialmech, or I'd nominate the Kiso or Diomede.
What about the Fennec? If any funding is left over, that could go towards the Pandion, both very interesting AFFS units.