What do you want in a camera? Do you want a fully manual camera or a camera with more auto features?
I shoot with a OM-1 (fully manual) and a Pentax ME (Aperture priority only) in conjunction. The OM-1 is such a great camera. It is very aesthetically pleasing, especially the black one, and the VF is very big and bright. You can shoot it without taking it from your eye if you can memorize the aperture and shutter clicks so that's nice. I have yet to shoot it much handheld as I have been using slow film with it and have been using a tripod 90% of the time, but comparing it to my ME, the ME feels nicer in the hand personally. It is rounder, feels smaller, and the faux leather is more grippy, but the OM-1 does just feel more solid.
Overall, if I were to have only one 35mm camera, I would have a very hard time Choosing between the ME Super and the OM-2 (both are cameras with Aperture Priority and full manual modes. The Pentax ME series and the Olympus OM series both have probably the biggest and brightest VFs compared to their Nikon, Canon, Minolta, etc counterparts.
I paid $80 for my OM-1n Black body (I overpaid a little) and I think around $30 for my ME, so quite a bit of difference there.