Just off the top of my head,

I haven't seen many tool sets.  You know, with all the nice cars, furniture, fixtures, farm accessories and sci-fi gear running around, there isn't a lot of stuff out there to fix it if it breaks!  What's M3 or M4 going to do with that trusty laser canon, toaster, automobile if it breaks down?  Fix it?  With what? 

A toolset with a toolbox would be nice.   Of course, I'm not suggesting a complete Sears Craftsman Toolchest or anything.  Modeling 200 odd ratchet heads accurately would be tedious...

Hammer, screwdrivers, pliers, vice-grips, needlenose pliers, woodsaw, vice/clamps, hacksaw and a nice toolbox or toolchest would be awesome.  Simple modeled power tools would be good too!  Now, if you're really enterprising, a complete workshop power-tool collection would be awesome as well... but, I'm sure you want to have some time to eat and sleep during the upcoming holidays. :)

Sure, you can find freebie models on the net for handtools.  But, they're usually found piecemeal and aren't obvious as a "set" of tools sharing a similar theme.  Even though my own toolboxes in real life are like that, a nice complete set of matching tools is always welcome.

Good luck!  Who knows, maybe I'll try my hand at it if you don't?