Pulling the trigger on the JB as we speak!
I've been driving the F30 and the E92 side-by-side for a few days now. I don't know if it's the steering, tranny or the differently-tuned N55 - but I am going to miss the directness, response and low-end grunt of the N54. Even without any mods, the N54 just feels more grunty in the low-end. Steering feels way more connected too. The F30 kind of feels like a boat, but it's one seriously planted boat! :P
Even with sport mode, I've rethought my aversion to getting a suspension.
This is my revised mod list.
19" Breyton Race GTR-S
2) BMS JB N55 + Intake
3) Catless downpipes