Programmer/Transmission opinions

So Im hungry for a little more power and with that comes the dreaded, and expensive, tranny build. I am thinking of purchasing an MP-8 for around 100 or so more on-the-fly HP and maybe even some help with mpg's. I already have a superchip turned up, think its worth just 90hp, but anywho. I called up Goerend since everyone seems to be a fan of their work to get some prices and opinions on what I need. TC, valve body, billet input shaft, and flexplate is what he recommended. I do plan on ocassion doing boosted and 4 wheel drive launches(at the track and maybe a little street racing). So my questions are firstly, anyone run an mp-8 superchip stack or think it would be a good idea? And if I plan on making another 100 or so horses will ALL of these tranny parts be necessary just for street racing and occassionally going to the track or could I squeeze by with just a converter and valvebody???
I appreciate any help/opinions:beer