questions about buying a G53

edit: that title says g53. excuse my dyslexia. it should read G35. :)

i'm looking at trading my mercedes in for a g35. I've been perusing the net and have found more conflicting information than i can shake two sticks and a stripper at.

question 1.
Has anyone found a reliable source that says wheather the g35 COUPE will have the upped hp? i've seen both 306 and 330 for it. any ideas on which is accurate?

question 2
I'd be buying an auto with nav ect. Will the new door panels from the sedan , with the integrated 10" subs make it to the coupe? that would be beyond sweet.

basically i'm looking to find out if i should buy a 2006 ASAP to get a good deal on the outgoing model or wait for an 07.

Any help would be appreciated.