You shouldnt get a Pegasos if you want an "super fast Amiga". It clearly isnt for the most Part.
That said its an alternative to the horrible x86 Architecture, much cleaner and more efficient than the "PC". MorphOS is also a technically interesting and promising OS, but I suppose its doomed because of greed of the Manufacturer/Distributor( Genesi ).
I was very temptet to get one and starting developing for it, until i read that