That's not too big a price jump for OS3.9 on a Draco...
You might get away with using a Mediator board on it, which would then allow for the future use of a SharkPPC. And of course, if it can ever get off the ground, there's always the Amiga ColdFusion.
I must say, an 060/50 with RTG is alot beefier than my li'l A4k!