The OM-1 was my first camera but then I upgraded to an OM-2N. Great camera. Later bought a F100. Still have that and the OM-2N.
Today I bought a Nikon D750 to use with my AFS ED lenses. Build quality is excellent. I briefly had a 7100 but wanted to use all my lenses so I went with full frame.
Best Buy offered great customer service. I was 1.5 to 2 weeks beyond the 15 day return date but the store manager let me trade it in for full value on the D750.