35mm Film Camera advice - Pentax ME Super, Minolta X-300 or Olympus OM series?

I would agree with everything in the previous answer, but if you don't need or want full auto, and prefer something that doesn't need batteries except for the meter, then the Pentax MX is a good choice. Less bulky than the K1000, and similar in size and general design to the ME Super. The Pentax K-mount is excellent for compatibility both forwards and backwards: not only can you use Pentax lenses from 1985 onwards on modern dSLR's like the K5, but more importantly for anyone using a K-mount Pentax film SLR, modern lenses made for FX format dSLR's will fit old Pentaxes. For landscape work I use a Sigma EX DG 12-24mm on a Pentax MX, giving me a viewing angle that would have been the stuff of science-fiction when the camera was new. The myth that you can't use modern (digital camera) lenses on film slr's is just that: a myth. Image quality from the Sigma on Velvia 50 is outstanding.