If you'll run minimal modifications I'd highly suggest a solid FMIC such as the Evolution Racewerks which I'm also considering as I can get all the rest of the piping from the FMIC to the intake manifold along with it all in one package. It also has a shroud to direct airflow better into the FMIC. I've seen it on a number of local cars here and it looks really solid. Helix is another great option but I'm strongly leaning towards ER. If I were doing my modifications over again I would've done the FMIC first.
'07 335i E90 - PTF ProTUNED by Dzenno - COBB FMIC - AFE DCI - AA DPs - HFS4 Meth
'09 M3 - Stock