Which tranny?
Give up the A4. If you dont plan on driving it to work everyday, its an awesome tranny. The key to it being good for in town driving is the biggest tranny cooler you can find, with a powerful fan. It can live with a bigger stall if you follow the "the cooler the better" plan.
You should call TCI or even Madman (built my tranny) and talk to some real experts. They dont want to sell you anything that will just burn up, and leave you pissed off. I would expect a very honest reccomendation from them.

