My Brother in law has the 1-6. Works fine, though I don't have any further than 140yds to try it at. Cousin has the Burris TAC-30 and I really like the glass in it. Still, I wouldn't trade either for my Leatherwood CMR4. Busy reticle (cool to me), but the 1 MOA center dot is nice. Like they said, at 1X, you'll see the front post, but it won't interfere with anything.
I'm sold on the Burris PEPR mounts. Brother in law bought an American Defense off Amazon when he got his Vortex, but I'm pretty sure they sent him one with built in MOA, because we had trouble with zeroing up close and not being way off from distance, and he ended up getting a PEPR later on. I hate mounting a scope in those sideways mounts as well. Major pain in the ace. Much prefer a top screw mount, and have never found any problem with them regardless of whatever advantages (if any) there might be from a side screw mount. I will say the American Defense had a really nice quick disconnect though.