Each to their own but I wouldn't bother with SCR
Knew the guys personally for a few years n they always cut corners and overcharge
Had an install done by them a few years ago that never worked properly and they refused to take another look at it despite being good friends with the owner and his son, and then they mashed the driveshafts on my Audi A3 after offering to fit coilovers for me, again denying all blame
Car audio direct or Brian car sound would be my 1st choices