I just received this thing, and even without turning it on or booting it up, i'm very impressed and hooked !
Just looking at the A4000 is enough, right? ;-)
I am unable to use the system, as I have no way to connect my monitor. I'll be posting some monitor wanted ads, but just wanted to introduce myself.
If you will find a Commodore monitor you will need the cable to connect it via RGB output. But it's better to find a ZorroIII GFX card (PicassoIV, CyberVision64/3D etc), to have bigger and better resolutions with the Amiga. With a GFX Card you can connect any LCD monitor with your A4000. ;-)
I am also interested in using OS 4 on this machine (or buying a Micro A1) and actually using my 4000.
If you want to use AmigaOS 4.0 Classic then you need definetely a PPC card (CyberStormPPC). Without a PPC card you can't run AmigaOS 4.0, just only AmigaOS 3.9. AmigaOne or a MicroA1 you will not find new to buy, as they don't exist (they are not in production some years ago), only second-handed, if you are quite lucky.