Just consider the fit4 and Grip2 are designed for different intentions. The Grip2 is buttery, but no lock out. The Fit4 is a lot firmer but has a lock out. The standard Grip is sort of in the middle, pretty buttery, very simple adjustment but also has a lock out.
The rear shock the performance series is probably fine, I have the factory series on my Ripley and Steve is right, I have it in the most open setting in the open mode and have never felt a need to change it. Performance series still allows for a firm lock out, middle and open mode.