Tough choice. I like the EDC function. I payed for it so might as well use it and for street driving, I like it. But for when it comes to handling for mountian type switch backs, light track use, the stock M3 is already awesome. I'd just like to compare to a competition package type. For an edge on performance handling and looks. If a sleeve kit will do that, then great.
There are no real good tracks around here to use its full potential anyways so just a slight drop and a little gain in handling is all I'm looking for. I' already running with RC-8 9" & 10" wheels that already give it a little wider stance. I might go with GTS 19" wheels too so a 1/2" drop would do it justice but I don't want to degreade the handling characteristics it already has.