The Borg warners are fantastic from what i have heard. My tuner has been trying to convince me for years.
I would just make sure you do all the reading in and actually decide on a figure you want. Will help with the overall build.
Even at 50k.... I probably wouldn't sell.
Love it too much.
I seriously can't put a price on how much the car makes me smile. Every time i drive it i instantly forget how much money i have put into it.