Sorry, I must be lousy at expressing myself. I do understand that they can make good converters that have a higher stall but still be streetable. The logic goes like this. If I have a car that drives well on the street, the engine, transmission etc. What advantage do I gain by changing to a "better" TQ than what I have? Similarly, What do I give up, if anything, or nothing, by getting a better torque converter?
The cost is not a factor. 600-700$ is not going to sway my decision. Pulling the trans to do the job is more difficult to justify. If the benefit is not worth the effort to do so......