I once had an OM1 and an OM2n with 28, 50, 135 and 300mm lenses.
I sold it all and got myself a F90X. I now have that and a FE2.
Although the OM system was good and the cameras small Ill choose a Nikon body today if starting over again. I find the nikon bodies better than Olympus. You get more info in the viewfinder on Nikon and I find them brighter. The F90X has a great viewfinder, much better than the FE2 and its is very good with AI(S) lenses so I'd recommend the F90X.
Regards Søren