Have you thought about the AMS FMIC? Also the ER one is probably the best on the market but might be out of your budget. The AMS is at the max end of your budget but its a great unit.
ER F-Series FMIC and Downpipes ON SALE - ONE WEEK ONLY - www.n54tuning.com - Email; Mike@n54tuning.com
NEW PERFORMANCE LINE N54 DOWNPIPES & M3/M4 & F30 ER DOWNPIPES NOW IN STOCK - ER N54 CHARPE PIPE SPECIALS - NEW JB4 G5 ISO for N54 and F30 N55 ON SALE - NEW S55 M3/M4 JB4 NOW SHIPPING