I am considering a new/used Remington 700 in .308, or just adding a few things to my old savage Model 11 that I've had for 14 years.

my question:
If I go with the Remmy I know I will get a heavy barrel, but WHAT LENGTH? 16.5, 20, 26? My end goal will have a suppressor put on it. My max shooting range for the next couple years would only be 750 yards. I love the look of the 16.5, but I know barrel length plays a huge game in the accuracy. What's the shortest I could get away with and still hit close to MOA at 500?