I also like to use film body on the side of the dslr. I just came from a weeks vacation in Italy and the statistics were approximately 3 slide films against the 6-7 Gbytes of digital images. The films are yet to be developed so I can't compare which method was better this time, but usually I like the film-colors and the rendering a lot.
And the cameras:
ME Super: Great viewfinder with small size makes it a really great camera. Legacy from my father.
P30n: Not as good viewfinder as in ME Super, but the usability is good. Minuses come from the bigger size, DX-codes and the plastic body.
SuperA: Similar viewfinder to P30n, but has smaller body and more control over the usage. TTL-flash support.
MX: Waits for new seals. A nice mechanical camera, which is pretty similar with ME Super, but more robust and technical to use(no automatic option).
LX: A great camera especially for long exposures. My favorite.
MZ-5n: A small af-body with old school controls, would like to change this body to a PZ-1 though.
Any of the above is a good choice I think