In my opinion, a towerized A1200 loses its charm. The only reason I would tower one would be to use a graphics card (which is actually a pretty good reason, but I think it's still better to buy a A3000 or A4000 in that case), since the only one you can theoretically put in a desktop case, AFAIK, is a BVision, but even that is very complicated (and, of course, you would need a Blizzard PPC for that).