My current FFP scopes are the March tactical and NF F1. The March is outstanding in every way. Best turrets I have ever used, tracks perfect and I can resolve at 24x a ant on the ground from two feet away. The illumination is good and I really like the floating dot reticle. I like is so much I have the 3-25 I just picked up off a Hide member here in SFP/MOA. The ONLY thing that could be better is low light performance, but with only a 44 objective it is to be expected. I have the ATACR and there is no comparison in low light, but the ATACR is three times the size and SFP.
My F1 was my old issue from the PD that I bought when we switched to the ATACR. I have been running it for 5-6 years now and it is perfect mechanically. Reticle is a bit outdated and the glass is not as sharp as other offerings BUT it is my go-to scope for almost any situation. Other little tidbits that could be improved are the zero stop system, March and the Razor II have that sorted out, and the illumination is a PIA to adjust and has only one setting. But this is still the power house of my fleet.
Just sold the SWFA 5-20 and it was a very good scope for the price, but I wanted to flip it for the second March. Really noting I did not like about it but some people complain about the illumination (center dot and some bleed over on higher settings) and stiff knobs but mine was not an issue.
Also had the Razor Gen I 5-20 and thought it was excellent, but flipped that for a second ATACR (I have no issues with SFP scopes) The Razor was a sold scope with very good glass and after a few months I didn't even notice how huge the turrets were. Kind of regret selling it but one day I will bump up to the Razor II that Rob and Ilya have sold me on.
Also had a Premier LT and really did like this scope a fair bit. You can find them for good prices but that lack some of the features of the full size line and I would just bump up to a tactical if I had the chance.
I have had a few others but in the lower price ranges, PST, Weaver etc. and all were good but if your looking to spend 2.5K no reason to skimp.
Sully