A2000, although I've had an A1500 for 15 years and haven't really done anything with it, it at least needs a scsi card & some ram.
Back in the day my a500 with 28mhz 68000, 250mb trifecta drive + 2mb fast, 2mb chip ram, 1.5mb trapdoor was awesome. However I wish I'd dropped all that money on a big box amiga.
I've had an a1200 since about 1994 with 2gb drive & 50mhz 68030+48mb ram. This was my everyday computer at home until around 2000. I wouldn't class it as my favourite, but it's the only one that has been plugged in for pretty much all that time. I started with a commodore one, but switched to an amiga technologies onea fter I:
a. fixed the display timing issues
b. unhacked the motherboard so it can use an original floppy drive
c. hacked the floppy drive so it had disk change and ready in the correct place then
In the process I think I dropped some solder on the emi coils & it melted, so I had to repair that too (although I think fixed is a strong word, I think I just covered it in more solder :-) Still works though, all I've had to do recently is replace the ide cable to the buffered interface, but in the years that have passed I've lost the screws as it's been open for so long.