I have converted over to all FFP/Mil scopes and would recommend it highly if you are trying to take long range shots. I find it easier to calculate drops, and as mentioned above, its is less math (which I am terrible at) trying to figure double adjustments at half magnification, etc. I personally like dialing as opposed to holding, and I have the Sig Kilo 2400 ABS range finder which makes an excellent combo. My rifle profile and ballistic data is loaded into my phone and synched with the range finder. All I have to do is range my target, it tells my my dope while I am still looking through the lens, I then dial at whatever magnification I am on, and take the shot. It is a pretty fool proof system.
SFP, in my opinion comes more into play if you don't have subtensions on your reticle, or you simply like to hold over and shoot within about 300 yards. Where the FFP I feel benefits from a more versatile PRS style reticle (Vortex EBR7C for example is a personal favorite), I think the SFP benefits from a more simple reticle (see the new Vortex Razor HD LHT). Depending on your personal preferences and shooting style, go whichever direction fits you.