Some cool Chrissy projects there!
Mine is the N54. I love the stock performance over the N52 330i and I'll be doing some similar stuff to you. THinking mainly of an intake (proper cold air rather than open pods), FMIC, basic exhaust stuff and a tune. Not sure what 'stage' that is but paired with the coilovers and M3 suspension bits I've got, it's going to be a hoot. I might do a 400m also just for shits n giggles.