I have a 365, and I love the saw - I have had no trouble with it.
You can indeed put the 372 top end on there. The only real difference is the air filter, but that is not a critical issue. The top end runs a couple of bills, which makes it cheaper to go for the 372 up front.
When my 365 gives up the ghost, I will probably put the 372 jug on there. But for now, it is one fine saw...