I chose the 140, because I have one , the 165c because it hopefully has a salvageable SCSI hard drive (and it is basically the 140 with a color screen), and the 540c* because it has a 68040 CPU (but no FPU; that's fine, though).

c

*Note that I don't yet have one of these, and the only time I've seen one in person was at a museum.