I went with the Evolution Racewerks FMIC, the horse power was difference is very noticeable. probably the single biggest HP gain of any mod (I have afe dci, afe exhaust and Cobb AP).
2008 Monaco Blue/Tan interior 335i sedan. Mods: AFE intake w/ scoops, AFE Exhaust, ER FMIC, Koni FSD/Eibcach Pro-Kit, Breyton Race GTS wheels w/ Continental ExtremeContact DW tires, Cusco OS strut bar. BavAuto Black/Beige seat covers w/ black floor mats, M3 rep trunk lip, eBay front splitters.