My advise, go direct thread. No mounts to dick with, no accuracy issues, etc.
Everyone I know that bought QD didn't buy enough mounts, and they either can't get them anymore, don't want to spend $80+ for every single rifle, or found out they don't work very well.
Sure, it saves a whole 10 seconds to get it off and on, but that's the one and only advantage.
I've had great luck with my Sig SRD762. I was out the door for under $800 with the stamp. Never had it come loose from a normal shoulder or tapered shoulder. Has always had a positive effect on accuracy, and it'll fit on anything I ever put 5/8-24 threads on.