I'd have to go with the A1200 here (of course in the original desktop case)
Small footprint - the second smallest Amiga
Standard Features - AGA, color composite, IDE interface, etc.
Expandability - accellerators, memory, HD, NIC, USB, etc. all in a desktop package.
Of course, I built one with this in mind. a1200 might find it commonplace, but I've only seen a couple others as outfitted as mine still in the desktop case. (Although, I still have a free clockport so there's always room for expansion)
