To be honest it's nice to see the M3 not winning, in the past all group (Autocar, Evo, car etc) tests ended with "but it's not quite as sharp as the M3" etc.
I like the AMG products more because of their hairy chested power delivery and everyday character.
My father has the old shape C63 Peft Package plus estate and it's still a great car lovely steering and the engine is just so savage in character. He likes it so much he has kept it alongside his newer RS6, which is quicker but doesn't have half the character.
It's definitely Alfa or AMG for me, followed by the leftfeld Lexus (well maybe)
One thing is for sure, you will look less of a tosser in the Alfa, which has got to be worth something!