Congrats, I bet you are one happy camper.
I've heard that a car can always benefit from more air. I am planning on adding headers, cold air intake, and a new exhaust to my 95 m3. My stepfather used to race in the 1960's and he said that these modifications will help the engine.
It's funny, everytime I post anything about upgrades on this site it seems as though people are scared to comment. Maybe that don't won't to be linked to a personal failure.
Good luck, enjoy.