The Om2n with a 50mm 1.8 is a great combination. OM2 is aperture priority auto and is an advanced off the film system that works well. Its hundred bucks. A fair price if it comes with a little warranty. Get it, use it, keep the F100 for now. Make the decision which to keep once you have used the OM2 for a while. GAS says unless you need the $$ desperately you'll keep both anyway!