The opinions you will receive won't be very valuable to you. Each of us who has had that experience will strongly recommend, Goerend, Suncoast, or DTT depending on which of those professional builders built ours.
DTT parts were used in mine but the transmission work and installation were done by an authorized DTT builder in Texas, far from your market. I recommend all three.
All three of those companies and their products are outstanding. I have never read a complaint about any of the three.
I would suggest you check their websites, talk to the owner, listen to his recommendations and estimated prices for what you want, and the availability of one of their authorized builders, and make your own choice.
I will say this: I would not have one of them build the transmission and ship it to you to have a local rebuilder install it. Set up of those highly modified aftermarket units is very tricky and precise and requires knowledge of their parts and how they interract with factory equipment and your truck. You could spend thousands and have some local install it and be very disappointed. Your local guy will screw it up and then blame the transmission builder unless he is a very skilled performance transmission builder.