I dont know why no one else said this, but seriously, if its OS4 you want to run you should get a SAM board, the A4000 wont even run the latest OS4 version and to get it up to speed i can see you using more cash on it then a SAM and it will be much slower in useage. If it were me, id just keep the A4000 for retro things and get a SAM board asap.
