Good idea. Back in the early 2000's I had a towerised A1200 with various add-ons and upgrades dangling from the motherboard.
I ditched it for an A4000, and even though I also put that in a tower (with Mediator 4000 etc.), the end result was a much tidier, much more stable system. Plus the fact that the A3000 & A4000 are just much cooler than the wedgie Amigas (IMHO, of course).
I eventually ditched that for an AmigaOne, but I'd definately take a big box amiga over an upgraded 1200.