Thanks to all for the good wishes and congratulations.

For those interested here's my comparison of the Z4 to the xfire (for what its worth)

Curb appeal: z4 seems to garner a little more attention, its probably slightly more rare than the crossfire
interior: crossfire is roomier and I actually prefer it overall
ride: crossfire wins hands down, z4 has run flats and it can be punishing
acceleration: crossfire engine is torquier (I had a limited), z4 pulls better at higher revs, z4 is definitely faster, but doesn't feel much faster around town
engine: the inline six is a gem, z4 has the edge here
exhaust note: I really liked the note of the crossfire, distinctive, but the Z4's note is just slightly more intoxicating
handling: the z4 feels more responsive and tighter, higher limits
shift action: z4 has better feel
solidity: pretty even here, both feel granite like

overall I prefer the Z4, but dollar for dollar the crossfire is an awesome car, which is why I traded in the 350Z for it.

cheers