Re: 700 P or 700 XCR
I don't mean to hijack the thread by getting slightly off topic, but it seems like you already have some great input that's directly related to your question (I have no real input myself other than to reassure you that any Remington 700 you choose will serve you very well - my personal choice was a 700 LTR).
With that out of the way, I just want to suggest to you that, whatever else you decide on, get yourself set up with a decent trigger (whether it's a trigger job, an aftermarket unit, etc.), and a rigid stock (HS Precision, Bell & Carlson Medalist, McMillan, Manners, AI, etc) - just something that won't bend (and shift your point of impact) when your shooting it off a bipod.
Then get the best glass you can afford.
After that, shoot as much as you can (seriously - go nuts). I just can't stress that enough. When you start doing that, the finer details of the equipment you choose will seem a whole lot less important (don't worry - you'll quickly find out if anything you're using doesn't work and then you can swap it out).
You'll learn more from one day at the range than you will from a month's worth of perusing these forums. Don't get me wrong; this place is a very, very good resource (and some guys here are wizards with a rifle and a wealth of knowledge). I'm simply stressing that there's just no substitute for experience behind the trigger.
(Stepping down from soap box now).
Good shooting to you, brother.