I couldn't find much on the web on which Ferrari's are best suited for each class. Through trial, error, a lot of credits and some hearbreak (458 Challenge makes me sad) I've been able to put together a solid garage of condenders. I am making no claims that these are the best cars for each class, but IMO the best Ferraris for these classes.
In the spirit of community and helping other Ferrari fans I've thrown my tunes on my SF and include:
S700 458 Italia
R3799 #62 Risi Competizione F458 Italia
R2875 F50 GT
Once I finish the R2 events I'll work on an R1 and post the tune on SF as well.