Offset saddles are only recommended if that's what your bridge came with, my man. Otherwise, you're gonna have your strings be all offset.
I don't have direct experience, but every review I was reading when I was researching them is they make the tone warmer/darker/rounder compared to metal stuff. I'd go for metal saddles, personally unless you think your Strat is too icepicky or something. I kinda like my Strat to sound nice and stringy, so I went with Highwood bent steel saddles.