Jim - I did not opt for the valve kit as I already had a set of extra rear remotes. I plumbed the lines from the rear to use for the grapple open/close function
I bought a RBG72 w/quick attach last year and paid $2250 plus shipping, plus cost of two extra hyd lines. It will handle logs and brush without taking a bucket full of dirt with it.
Consider how much you will use the grapple and under what curcumstances to determine the best grapple for you. If you can get by with a bucket attach grapple add-on - then go that route as it will be less expensive.
Have you priced any other stand alone type grapples like Anbo, etc.for comparison? Implement Cost is usually a pay me now or pay me later situation. I have no regrets about purchasing the WR Long grapple except that I waited so long to do it