For my money, the XK3c is by far the nicest "portable" I've played. The Nord C2 is really nice, but it just doesn't cut it for me. Real drawbars are what I like.

The double manual XK3c felt and sounded so much like a my old B-3, it was scary.

If I was playing in a blues band and played predominantly organ, I'd have the XK3c double manual in a heartbeat.

Haven't tried the KeyB Duo...no dealers here.

Ian