This is a hard question. I can't say who is the best.I've dealt with T/C and Knight. Both are top notch in their Customer Service and quality.Never dealing with Ruger in the BP dept. I would imagine I would receive the same kind of service from the BP dept as I have from the regular firearms dept..I contacted CVA once about a manual and received fast service.Thankfully of all the ones mentioned I've had good service from all of them.I would say T/C has a slight edge but a very slight one if any.
Ruger Redhawk