Hi,
Yep, still got both.
Dont know about £10k but what year cars would that get you? Both great cars and have good and bad things.
Ours is a late Dec 99 with 32k on the clock, it looks a couple of years old and drives lovely. I would only change the stereo if i had to at this point. The Z4 is 07 and reflects that in the cabin. I would only change the seats and maybe add another litre to the engine :wink:
Brand new side by side id get the Boxster, after that it all depend on age and condition.
Becareful trying to get a bargain with the boxster, like any car things can go wrong.
Cheers
PaulN