Cheers Kevbo... know what you mean about the interior, it is very bland, but so is the M3... for the amount the car is sold for, they could atleast put a nice bose or B&O system in there, even tho they are Audi option, but they are both german, so why not.
They just look the dogs danglies IMO...
I think it may have to be the 350 option on the cossie, but ill let you all know what i thought on the Z4 after sunday.
Massive thanks for all the replies, it has very nearly helped me.
I am swaying towards keeping the cossie, but will all be decided sunday i think.