I can't comment on the Ventura or X-Bolt, I've never shot either, but I do own a S2 in 243 Winchester and a friend owns one is 270WSM. The bad is they are heavier than most other bolt guns and I don't like the safety lever. It works fine, I just think it's kind of cheap looking. For the cost though I live with it
The good is that if either one of our guns is not shooting 1/2 MOA, we know we're not shooting well that day. My friends gun is doing that with Federal Premium ammo and my gun has done it with handloads using Barnes, Berger, and Remington bullets. The two stage trigger is crisp and one of the better factory triggers I've ever felt. If you don't mind the extra weight or the "cheap" safety lever, take a hard look at the S2.