Don't get an A1 unless you have money to burn and love Linux (since thats all you'll be able to run on it for ages yet). Otherwise get a Pegasos, which you can start using right away with MorphOS.
If you really want to run OS4 when (if) it comes out it'd be cheaper to buy a Teron PX board from Terrasoft and an OS4-enabler kit from KDH or Vesalia than it would be to buy an actual A1, thanks to eyetech's rip-off prices.
