hey i'm a lefty dave also! i think ffp is the best just because you don't need to think about where your magnification is and thus what your adjusted holdovers (wind and/or elevation) need to be. no on-the-fly math. but the key is getting a scope with the magnification you will use. if you get a 4.5-27 and never get above 18x, you will have a smaller reticle to see. but if you get a 3-18 and keep it at 12-18x, you will have a decent size reticle to see.
all that said i've used sfp's for years and they've worked great for me, including many PRS matches. just have to keep track of where your magnification is and what the reticle lines mean at that x. and to the extent you dial, it is irrelevant.