I went in for the JB4 PnP and I'm VERY happy with it.
I have an '08 E92 with no other mods. It's my daily driver (150 miles a day) with combined highway/back roads and with the recent drop in gas prices, have been using Sunoco Ultra (93 octane) and I've just passed 50K on the clock.
I must say, Map 5 is the most fun. I have the exhaust flap option enabled and and love to watch the sidewalk dwellers look for the car making that sweet sound. But the most fun comes when, at 50 mph, you stomp on the go pedal, the trans downshifts and the car hops sideways and the DTC light starts flashing quicker then my turnsignal .... and the car doesn't fall flat on it's face but keeps pulling! Before it gets much colder and the snow flies, I gotta turn off the traction control and 'shift' into DS mode. I'm sure it's going to be fun.
Go with the JB4 PnP. The change from stock to fun is a couple pushes of the steering wheel controls and the change is awsome.
No matter how fast I go, there's always someone slower in front of me.
JB4 PNP .... Love at every stomp on the go pedal!