when the time comes, i plan on using Jack's for a full cluster rebuild. i like the idea that he will rebuild the gear clusters, and i can assemble my transmission the way i would like to. its easy for me to swap clusters, forks, rails, etc, but i don't have the special tools for bearings, or a press. the guy seems awesome, he posts up a lot of good information for us doing transmission work on our own, and a lot of good driveline advice in general. one of my good friends just got a basic rebuild from Jack's and he absolutely loves the way the car shifts.
we also have a local here in CT who does awesome transmission rebuilds. i don't know if its against the rules to advertise for someone who isn't a supporting vendor, so if you would like more information, please PM me, and i could put you in contact with him.