Beautiful car - congratulations
Having been in quite a few super cars recently I have to agree that the feeling of acceleration in one of these is about equal to a 911 turbo, and pretty much quicker than anything else inc 458 and GTR etc. The only car that was quicker was the Aventador, but you can't really compare them as there is no way you could use that as an every day car.
The SLS also has a better interior IMO than all the Ferraris / lambos etc.
The Merc is a great choice, I can totally see why you chose it Palmnuts.