Very excited for you Andrew, I love the SLS (although I was very keen on the Jaaaaaag, as well)
The E coup you're looking at - will that be the new facelifted model? I think the facelift vastly improves the front-end appearance and turns a nice looking car into a genuinely very good looking car...
Gone but not forgotten:
325i M Sport (E92), Black Sapphire, Coral Red Dakota, 19" 225's, Seat Heating, 6FL and de-badge
Replaced by 6.2 litres of AMG powered C class.