Ordered a Rev Motoring intake tube. Hopefully gonna get some more wooshy woosh noises when I step on it, but I don't expect a whole lot. Just cheap, easy gains.
I think next up is the F10 M5 illuminated shift knob. $200 but it looks GREAT and I wanna upgrade my knob anyway.
edit:
got these coming in the mail too - I have a tint but it really isn't great so instead of redoing it I just got these.