The interiors of the newer Z4's do look better than the older versions, exterior wise I am not so sure, I kinda prefer the look of the old E85..
Yours is a great looking car though and nice n sparkly clean...
Top looking motor. I do like the white/beige interior, especially against black. It makes it look really classy IMO, even if it takes more effort to keep from getting grubby.
Once you get it mapped, you can then make full use of it