IMHO, the only real stinker in the entire Amiga family would be the A600 due to it's limited compatibility and lack of expandability. Althought it does have the PCMCIA and IDE interface that help.
Some of the Amiga I own (or have owned):
A3000 - The best Amiga IMHO. Sure it lacked AGA, but with it's built in SCSI and Flicker Fixer made up for that.
A1200 - Love the form factor and expandability. Ihave a SD/FF, HD floppy, 20GB HD, PCMCIA NIC, Blizzard 060+SCSI, 128M RAM, all stuffed in the stock case (I feel towering defeats the purpose...).