I would also suggest the MZ5n (ZX5n) or MZ3 (same, but with a higher top speed). You can use it fully manual or fully auto, it has multiple metering modes including spot metering, DOF preview, AA battery grip, plus little features like panorama mode and auto-bracketing that may appeal. It is fully compatible with all of the older lenses and the only ones you can't use are the FA-J (no aperture select on the lens) and the DA lenses which may vignette. As others have said they are dirt cheap: $130 - $160 at KEH for exc or LN examples and less on eBay.
(note that the MZ5/ZX5 lacks a couple of useful features that you get with the MZ5n/ZX5n so is best avoided, given the small amount of money involved)