I'm a fan of the platform, having a Sig 556, a 556R, and a 716. All of them are great shooters and have the typical SIG quality. My only complaint on the 716 is that it is really heavy. My cousin's husband has a SCAR and the weight difference is very noticeable between the two. But shooting from a bench, the weight difference might be working for me as it out shot the SCAR appreciably.
I feel sure you will not regret your choice and will really enjoy shooting your SIG. Congratulations on a nice acquisition.