They look like the same BMW Performance parts Ben, I got my bits here:
http://www.bmw.co.uk/bmwuk/owner/accessories_enquiry/subhome/?cat=performance&product=aerodynamicsMine is DCT, needs to be in Sport to get close to a mapped DSG, I still find I've got to paddle down a couple of gears manually when you floor it as its a bit slow to kick down in Auto, but changes up lightning quick with a nice crack. Does make you realise how good the little old DSG box is in full Auto.
It has a launch control but wont let you use it again 'until you have travelled a certain distance' havent found out what that is yet but its defiantly more than 1/4 mile
On paper the BM and the Edition 30 are about the same (pre strip out) but I know what I'd rather be in when you get to some corners, the 335i is a bit of a lard arse and you couldn't call it nimble, I'm sure the 135 would be alot more light on its feet.
The Straight 6 is properly addictive, sounds great and nice low down pull, never had a go of the old proper Twin Turbo, but I cant really say there's any lag, its not really fair to compare it to the Golf as its a bit hard core now.
I've done 12k in the BM and can easily get mid 30 mpg on a run, I still dont need to change the rear tyres but will try PS3's as the run flats have got better but are still sh*t.
I've looked at the BMW Performance engine tuning kit, (won't effect the warranty) gives additional Rad, air intake, fan & software = extra 50Nm and 15kW (dont know what that is in Hp). She deserves a birthday present in May
Enjoy Ben
Edit: 15kW = 20Hp
Tommy_A, I started a Carpentry & Joinery company about 20yrs ago