I had the chance to shoot a RMR and DPP side by side at the range locally, and the RMR a rugged little optic. I choose the DPP because the window is a lot bigger and I had an easier time picking up the dot. I don't think you could go wrong with either. The only downside to the DPP is back up sights are very limited to non-existent. However the triangle dot is awesome.