Yeah, I think too, you should go with 6.2 version. I had two 4.0 German A2000 machines and I replaced both of them with newer motherboard. It is (4.0) really, an old A1000 with expansion slots. So if you are after best user friendliness and expandability, stick with newer or if you like more collectible hardware go to 4.0. I personally would prefer max.chip ram in my Amigas, and you just can't get past 512kb barrier in older one (at least not easily). And yeah, stability is an issue with old one. I used Apollo 030 card in mid '90s with my 4.0 and that made me swich to newer mobo.
