i love these threads...
Without a doubt, the e39 (~1997~2001) M5
The e34 M5 should be done, they already have a normal 535i, it shouldn't be such a stretch to make the M5.
A 335i e90/e92 bmw sedan/coupe, these 328's just don't do it for me. But if the e46 is any lesson, they won't do any more.
and autoart might as well put out a clubsport e46 330i sedan, as they already have the gtrs.
and kyosho needs to put out the rumored z4 m coupe.
--soheil