I have been using the Trijicon RMR 06 type 1 for a couple of years , no complaints so far. I ended up picking up a type 2 recently, but have not really had the time to play with it yet. Good luck with whichever you go with.
As long as your gas gun is capable of 1 moa you are good to go, most prs competitions the targets are usually 2 moa or bigger. Being solid on positional shooting is probably one of the biggest factors.
Another option is to go with the Remage barrel setup with your existing Remington 700, you can run short action rounds with the long action,works great. I have a long action Rem 700 setup with a 243,260 and 308 barrels, mostly use it for prs comps.