I wouldn't worry too much about the tranny. They've gotten better over the years. There's a lot of people who are at stage 2 on the stock tranny w/o any problems, including me. Even if you beat on it stock, the tranny might fail. If you treat it good, it will return the favor. It seems like you've done your research here. Good deal.
I wish more people would use the info that's already on this site instead of asking over & over.