The few advantages in moving an A2000 into a tower is making more clearance for the CPU slot accelerators, so then you can put a very large heatsink + fan over the CPU itself (in case of a 030~040 unit (030 also heats a lot, but nothing compared to a 040).
Oh, and the access to the custom chips.:-)
Also you can have more hard disks inside to fulfil the SCSI chain.:-D
