All the big, and some of the small race trans shops offer about the same HP rating trans for near about the same money. What I see that bothers me is the huge spread between what's actually inside. Sometimes really experienced tranny shops know just what it will takes at a min to hold X power. Then there's the quality of X parts at X level. Just saying there can be thousands difference in what's inside 2, X rated transmissions. Be specific about parts used, brands, and just as an example, look at people saying 1.8 straight cut. I see everything from factory parts cut apart with the parts grafted onto them, to full extremely high quality, not one factory part associated. Yet both are found at the same price, one tranny to another.

Lastly, build, or buy for the most power you can imagine having. Doing it every time you improve power is costly.