Congrats! I pick up my new E90 Sunday afternoon (today!) from BMW Bellevue after about a 10 week wait. Same options and decisions (DCT) as yours, except Le Mans Blue and Silver Novillo. When my rep called to let me know it's here he said "you're going to love the Performance Exhaust." Yes, I do believe I will!
Delivered 9/4/11: 2011 E90 M3, Le Mans blue, ZCP/ZCV/ZP2, DCT, Premium sound; BMW Performance Exhaust, CF Splitters, and "Black chrome" kidney grills.