I just installed a preloaded VirtualBox image of AROS just to try, as I have no knowledge or experience with it. I really like it. I don't know any of the requirements to run it on a real Amiga, but since I only have an upgraded A2000 and an A500, I am sure I can't run it on either of those. Too bad that the new Commodore USA folks aren't interested, as I think this would be a good OS for their so called "Amigas". Thanks to those who have worked so hard on it.
Looking at the specs of your A2000 it seems it should be able to run AROS68K.
http://aros.sourceforge.net/download.phpthe kickstart image is in the iso or on the boot floppy.