One thing I would also consider is do you plan to customize it to your liking? If so you would be better off with a direct impingement dpms lr308. This is the most prevelant platform, and by far has the most available parts compatibility in the large frame ar arena. The dpms lr308, bushmaster xm10, fulton armory titan, aero precision m5, knights armament sr25, and many others use compatible parts.
I have shot the sr7.62 and sr 5.56 they are nice rifles as is, but remember that gas systems of the piston nature are proprietary, which means you have to get replacement parts from that manufacturer.
The lr308 uses alot of the same parts as the ar15, so parts are cheaper and everywhere. As far as running suppressed, you can add a SLR sentry adjustable gas block and regulate the pressure the same as a piston. Cost $100. I have 2 set up with this gas block. The direct impingement has the potential to produce better accuracy due to its free floating capability.
Do not misunderstand me, I am not trying to get Into a discussion of which Is better, and why. They are both equally useful, and have a huge following.
I just feel if you plan to keep it as is, then a sr762 is great for some, and will do well. If you want to change it to your liking, want to build a second upper, or drop weight, change barrel length, or calibers the dpms lr308 pattern is the best option. Sr762 around $1500, oracle dpms $750. You can spend the other $750 to upgrade to your tastes.
I would like to own a sr7.62, but currently I have 5 or 6 lr308 platform rifles I built to my requirements. They are more accurate than most, and I have several different calibers, from 308, 243win, 338 federal, 6.5 creed etc.
Here is one I built from a bone stock oracle, added a 16" free floated hbar, 12.5" midwest rail, magpul accessories, and topped with an eotech 512. Its capable of better than 1moa at 100 yards.