So you woke up Grumpy this morning Firko, does that make you Snow White?
Over the last couple of years I've raced a YZ465 (dunno what model but it was white) a CR450RB, CR480RC, CR480RD and a CR500RE. To put them in order of preference I'd rank the RD & RC first and second, the 465 third, the 450 4th and the 500RE last. Unless you're a fit B grader forget the 500, it's too much.
I have to admit the 465 is a great bike but the best Pre '85 bike of them all is the 1983 480. Fast, handles, stops and is easy to ride.