I am not a fan of OS4, but I see no reason at all to use Scalos or Magellan on it. And Ambient is nice, but it is a totally alien desktop, nothing Amiga-ish in it.
Both Scalos and Magellan on the other hand, are pretty good enhancements for 68k Amigas. I personally have chosen Scalos over Magellan for all my high-end setups. It is a pitty that development on it seems stalled.
