Technically:
1) Neo Geo - Despite the tiny RAM, great bandwidth to more than compensate for this.
2) Amiga CD32 - The Amiga 1000 and the cheap A500 were revolutionary, sadly the A1200 was a minor upgrade, the CD32 was technically almost just an A1200 with CDROM drive in console casing.
3) Snes - Nice capabilities considering entry pricing for its time.
Games wise:
1) Neo Geo - Basically arcade quality gaming. Sadly not released outside of Japan. Even if it would have sold badly due to high entry pricing over here, I would have loved to own one.
2) Snes - Basically due to Super Mario World, for me no other game including the other Snes games came close.
3) Amiga CD32 - Sadly suffering from a premature death and lots of Amiga 500 games remastered unchanged for CD, there were good games taking advantage of the hardware to some extend like Alien Breed: Tower Assualt, Banshee, Super Stardust HD, etc.
