Yes, most of them will stay in Germany, but some other countries will get some (but not the US).
By tweaking the engine design, hp is up to 350+ from 333.  The weight is about 400 pounds less than the standard M3 using advanced composites and stripping out just about all creature comforts.  So 0-60 times will come down a bit from 4.9 (like who needs to go faster than 4.9?).  Not even considering the the extra cost (about 20K more), I would rather have the standard M3 since it is more comfortable and quiet.  I guess if you're looking for performance, you don't care as much about those things.  I'd rather have power windows, mirrors, door locks, sound-deadening material, stereo, and more comfy seats and still have a great sports car.  The CSL is almost strictly for driving at the track while still being street legal.  It is a hot car, though.  No doubt about it.  I just wouldn't want to live with it every day.