You will not complain about the performance at all!
My JCW was about 220bhp too as I had some of the JC additions.
The driving experience is very different and it might take some time to get used to the smaller rev-range but once you do it's brilliant. The amount of torque that's available in the gears is superb - more often than not you don't need to shift down to overtake etc.
My biggest problem is the lack of noise. The JCW (as you know) lets you know what is happening aurally. Loads of S/C whine and rev noise. The BMW is just soooooo quiet. I reallly have to watch the speedo as it will hit license losing speeds with no problem at all.
I am very happy with the switchover - sometimes I miss the roadside attention my JCW got, but IMO the BMW looks fantastic with the M-Kit too and if I want attention I still have a '67 Cooper S sitting in my garage to play with at the weekends
