FRH kits are a minimum 22 weeks out... Must be good, but Im not inclined to wait that long.
Summit Hydrualics makes a kit that has the front 3rd function and 3 rear remotes for $1,450. DIY installation doesn't look all that difficult and probably take 6-8 hours.
Kubota OEM is $1,300 for the 3rd function and just over $4,000 for 2 rear remotes and the top and tilt setup installed.
I'm leaning toward the Kubota OEM components and having the dealer install them before I take delivery because (as one would expect) they give the cleanest setup, and would all be under one warranty should there ever be a problem. I also assume that it would be more desirable should I ever want to sell the tractor for any reason.