I went through this same decision tree a few months ago. I wanted to replace a Nikon M223 on my 3-gun AR.
I have an FFP 5-20 mil dot on one of my rifles, used for medium to long range - it is perfect, for me, for long range, unknown distance shots where time is less of factor than it is in 3 gun. I went in thinking FFP scopes are the best thing since sliced bread.
So, I started out looking at FFP scopes. I found most to be too busy for 3-gun, and the horseshoe too wide for the quick shot.
And, most FFP scopes seemed to try to meet the needs of every shooting situation.
Long story short, I decided on an purpose built SFP, 1-6, with a simple red dot and simple BDC marks up to 600 yards. For close in, the red dot is perfect. 300+y on 6x, the BDC works great. from 100 to 300 on 2-5x, I have found that the subtensions are plenty close enough for the 3 or 4 MOA targets that I see at most matches. Most of the time, I am on 1x (red Dot) or 6X anyway.
FWIW, the scope I picked was the Vortex HD GENII with the JM reticle.