If you're going to spring for a high-end rifle such as a GAP, get a custom action. Defiance/surgeon/nesika etc just feel 'high-quality' MUCH more than a trued 700. If you're looking for a measurable advantage, working the bolt on a custom action often will not bring your rifle off-target near as much as a trued 700. One of the reasons they're so popular in the benchrest crowd.