I always thought the IFU-30 was the best looking by far. The cover, eject lever, the locking power switch in the front, the way the PCE and CD-ROM2 slide in side by side... It's beautiful in an industrial sense. I read that NEC/Hudson went with a mini-din 8 plug for the controllers because they wanted it to look more like a PC than a game console. I think they completely succeeded with the IFU-30 package - it looks like a machine, not a toy.