I am totally opposite. THE ENGINE is more important than blue tooth but age is also important.
The first zd I picked 2.5 as it was the best performance to dosh ratio BUT got a 03 fully loaded rather than a basic 04. Mistake 1) less warty 2) older car, 3) YOU loose most of the money on trinkets in trade in so the 6K bling went puff. IT ONLY MAKES IT EASIER TO SELL, but If I had the 04 it would be worth more just because it is younger.
Then got a couple of 2.5 SI sport. Not SE but SI as this was the better engine and the sport was a derivative not accessories so got a bit more money back in trade.
New model and I just could not think of getting into a 2.3 so rather get the newest 3.0 as I could and it was auto with nothing else. Ironically like the old z4 the 3.0 basic is less basic than the 2.3 so you not only get a better engine but more bits thrown in, I had 18 inch rims.
Now the new model is getting on, better incentives such as free M sport upgrade (like the old model). I opted for the 2.8 M sport, again best price performance. In trade in as its a derivative will be worth more than the basic model.
So for me its the engine size, year then trinkets, to a limit. I would love a 3.5 but the plate would be too old for my price/ performance point. INCLUDING MPG
Now I have bluetooth back, a wind deflector, massively improved seats and heated seats, lower stiffer ride all part of the Msport package I am a bit more happy with it but I would still be happy with nothing but the 2.8 thats what gives me the biggest grin.
Also there are differences between a 10 plate and new 62 plates such as roof operation at 25mph, stop start, usb ohh and warty lol.
tomscott, Yeh I would love a 3.5 or for that money ill jump to a VW porker, Been looking at older 911's can pick them up for less than 20K.
But 6 V 4 debate will continue,
Times move on and if I can pump up the MPG and gaining performance Ill jump at the chance even if its a 800cc 1 cylinder compressed air job using bird droppings and chip fat to get 60 to the gallon and as fast as a straight 6 like 5.5 seconds count me in. If I want exhaust sound I would be in a tvr