As I own several Olympus lenses I am lusting for an OM camera body... using these lenses on an EOS with an adapter is an infamy.
The main purpose will be landscapes. For the landscapes I will use infrared film sometimes (now you know why I don't want to do that with an EOS, it fogs the IR film...).
So, no winder, no motor, no TTL-flash is needed, but I need a camera that does not kill the battery during long exposures, preferrably works without batteries, and is rock solid. An OM-1 and 1n are probably a good choice.
Is the OM-1n a better choice as it is younger?