The A3000(T) is nice and stable hardware wise, but both the desktop and the tower are not mechanically very nice for expansions.
There's no room for anything in the desktop, even though it looks nice.
I'm considering relocating my A3000T into a generic ATX fulltower case, just because the original tower's construction sucks so bad. (vertical drive bracket, drive rails, millions of screws that need to be in to keep the system rigid, otherwise everything falls apart constantly)
Sure, it's sturdy, but that's the only positive feature about it.
Yet still I regard the A3000T as the best Amiga commodore ever mass produced. The A4000T is probably the second..