@Amithony
I am very happy with OS4.1 in my micro. It seems more polished than 4.0, and more stable. I find that my micro with OS4.x is very quick and is more responsive than several of my WinXP Pro machines. As a long time Amiga user (20+ years now), I think it is the best Amiga OS yet.
For those who complain about the high price of SAM + OS4, the amount of money I have in my micro is far less than what I have sunk into my A2500/Blizzard 060/PicassoIV system over the years - or what others have in their Cyberstorm equipped machines. Amigas never have been cheap and probably never will be. The SAM system costs less than my micro and is lowest price Amiga system that I have ever seen.