Have had a quick thru what everyone has said so far but at the moment haven't got the time (will have next week) to digest in detail, so here's mu thought.
TOURING CARS - No issue.
LE MANS or PROTOTYPE/GT - No issue.
NINCO A/W generally no issue but other manufacturers make ROUND/CONCENTRIC PLASTIC wheels that are easily available, without rechecking can't remember if the axles are an oddball dia.
GRAND AM - I don't run but a standard in-line Slot-it would be happy with (with restrictions??)
POLLY PORSCHE - I don't run, and I cannot find anything on the web about them (what else do they make).
SUPER 4 x 4 or SUPER MINI! - I want more time and discussion on this one, suffice to say does anyone know the exact scale of the NSR Clio's because if its less than 1/30th why can't I race 1/28th? (silly suggestion).
SCX CLASS - Good idea.
CLASSICS - There are classics and classics, I'm with Rob about Fly classics, Lola T70, Porsche 917 but a Slot-it or NSR Le Mans car with a Ford GT body is just what you'already got, you may as well have 1 Slot-it or NSR chassis with a range
of different bodies, with Slot-it and NSR no one would be competitive with anything else. More time needed.
ALL FOR TEAM RACING as us newbie's feel better with a win or two. 1/24th GT mmm ?
Got to go, if its not all wrapped up by the time I get back I'll be on again, oh' nearly forgot, whatever class, run SCX or other motors and get double points against those using short/long cans (open for discussion).