If morphos isn't satisfying anymore, why not try linux ? Although linux_ppc is not that common as on 386, it's a nice way to use your peg....
... to be honest, I did't think that way, when I bought my Pegs .. but after waiting for years for MorphOS 1.5... watching a great OS slowly dying .. .. there's no reason for me to buy any more system ...because hardware is nothing without software...