It doesnt really matter whether you get a whitebody unless you like racing white cars or enjoy your own paint work. I tend towards the real race car look so I like autoscales.
You can pretty much make any body fit mr02's but some are really narrow and dont fit well around the battery tray and front towerbar areas. You'll find for example the F1GTR body i sent runs best with -1 offset fronts becasue its scale is a really narrow front end. Certain older cars are a bit narrow on MR02's but most of them fit fine.
I think minizracer has a compatibility list somewhere.