Pats:
Took my Honda s2000 here, Derek is a great guy to work with. Plan on taking my 135i there soon to get a 3" cold side intercooler fabbed up, and the DPs installed.
http://www.innovative-motorworks.com/
Also taking my car here today to get the misfire issue resolved, first time going here but they seem reputable:
http://www.atspeedmotorsports.com/
Can also try this place:
http://www.4induktion.com/