I bought the 700 VTR with the X-Mark Pro. The trigger broke @ about 8 lbs. I adjusted it down to about 3 lbs. and it was great or so I thought. If you toggled the safety on and off, the gun would fire. Minimum safe weight was about 5 lbs. That whole incident kinda freaked me out, and rather than deal with a heavy trigger pull or unsafe trigger, I opted for a new one. I bought a Timney 1.5 - 4 lb trigger with safety and I couldn't ask for more.
I have a review of that rifle and trigger here: Remington model 700 VTR