Welcome to the forum. Get some trigger time in and see how you like the way it shoots. The first thing I do with any new Remington 700 that I get is to change the trigger as pointed out. Then Bed the action and float the barrel and you might find you like it just the way it is.
I personally would recommend ditching the stock first. The Hogue is very flexible with the heavy barrel and tends to float or contact the barrel depending on how the front end is loaded on a rest or bipod. It is almost impossible to be consistent with it. I put a B&C Medalist Light Tactical on my 700 SPS Tactical.
As for using mags, the Magpul 700 Hunter mag conversion is supposed to be a drop in conversion. I do remember reading about needing to open it up around the trigger with some aftermarket triggers.