you act as though pegasos is 'done' ... as a board... sure the Peg1 is done...but Peg2 is comming out this year ...and will definitly be superior to the A1 in its current iteration... it would be wise to get OS4 onto superior hardware.
I personally dont care about OS4 now... and wouldnt want the name Amiga on my board/os/etc when I buy my Pegasos...