I am waiting for the next M3's as I don't like the newer E90's as much as the E46 M3's body style.
I think trading an E90 + CASH is a great idea!
I'm sure you can find a great 2006 ZCP with low miles.
2004 Mystic Blau Grau Nappa ///M3 Coupe 6MT
CDV Delete, DICE Silverline Pro, XM, Clutch Stop, AS 20% SSK, RE Tranny Mounts, Mystic Blue Surround Matte Black Grills, Matte Black Gills