Re: 5R vs 700P
I would spend my money on having the 700P "accurized", unless stainless is worth the money to you. The actions, I would bet, come off the same tooling, so there shouldn't be any discernable differances in tolerances.
Remington says that the 5R is all hand built in the custom shop, but its still the same thing, just hand fitted, if you can get everything trued up and a barrel for under $500, its a no brainer.