All that matters to me is the fact that my Pegasos runs more programs, many times faster, and with much less hardware / software hassles, and at a quarter of the cost, as my old Amiga 4000/CSPPC/Mediator system.
If you want a modern, good-looking, fast, Amiga-compatible OS, then get a Pegasos with MorphOS. This is my advice. Put it this way, I haven't yet spoken to anyone who bought a Pegasos and wasn't pleased with it. There's nothing stopping you from having both a Peg and your A1.