I fired both extensively at a shoot only yesterday, (FS2000 and PS90). I have to say, I was not a fan before I shot them, but would love to have one of each. I will say that the stock sight on the PS90 left a lot to be desired - aquiring the aiming circle took some doing. Other than that, the ran 100% and were accurate, (shooting eggs at 50-yards) as I could want. The FS 2000 had an Eotech on deck, which almost seems designed for the gun...Certainly not high, (or even on), my "must have list", but if the price were right - I'd jump...