I've had a 3650 since last Easter (Easter Sunday actually) as a replacement for my old Craftsman. The 3650 is pretty much an updated version of the old Craftsman saws and the trunion and motor mount are near copies of my old Craftsman (Ridgid used to make the Craftsman saws).
Anywho, I have no complaints about my 3650. It's been pretty flawless and works well for everything I've done with it. For a sub $500 saw it's one of the best choices out there.
I did remove the right wing and added a router table to it though. The fence works well also, though it is no Biesemeyer. It is accurate, sturdy, slides easily and is repeatable.
I have been keeping my eye open for an older unisaw that I can pick up for the right price and rebuild if I have to. A cabinet saw would be a nice addition to the shop in the future.
Jamie