An XP is a fantastic gun. I bought a stock 223, put a Leupold 4x on it, and fell in love. That gun was just plain fun, no if ands or buts. Then, I traded that for a custom XP, from a well known benchrest smith, and it was just unbelievable. This one I put a 6.5x20 Leupold on, and was amazed. The day to day consistency is second to none. I'm sure this took me to the benchrest game, cause the accuracy was nothing I had seen before.
I started building my own guns for benchrest, and worked on my own XPs. Bought a 35 Remington bone stock, pulled it apart, put a Hart 22 caliber barrel on in 22BR, mounted in a Lee Six stock. Wow, absolute death on prairie dogs!
Shooting one is a bit different, takes some getting used to and the method, but once in place, they are great. I always favored he center grip, just for the sake of keeping things as they were, but many like the rear grip. No question the rear grip gives the trigger option a wide open field, but you can adjust a stock trigger down to a manageable break.
I only have one now, custom barrel in 221 Fireball for the nostalgia thing, but don't be fooled, the 221 is great.