congrats on your '12 M...and welcome...
....I think time will tell if there will be any mods for the '12 M (prolly still doing R&D)
here is something to review = AMG from both sides of the spectrum
NEW
'12 CLS AMG $100+ K / 5.5L twin turbo
550 hp
590 tq
7 speed
0-60 (3.9 sec)
OR
USED
'06 E55 AMG
5.5L supercharged $30K and less
469hp
500 tq
I'm looking to pick up a used E55 for my 'weekend' car
ADD -- w RennTech/tune, headers and pully = 670hp
[youtube]
http://www.youtube.com/watch?v=CDNjK77e9KQ[/youtube]
....