If OS4.x ends up running perfect under WinUAE...out of curiosity...how much is OS4 ?
Quickly looking something like 100-130e depending from where you order it, but I think the more important question is if you can get it even if you have the money. I know couple of people who have been waiting their OS4.1/Peg2 version for a year or so from the retailer. Apparently they don't have much in stock or batches are rare...