Agree with a couple of comments especially heated seats (in the front as a minimum).
Talking about seats - I really prefer the sports seats, they give you much more 'lateral' support and imo are more comfortable.
Also - Extended storage is as close to a bargain as you get with BMW!
The brushed aluminium (internal) trim was imo much nicer than the standard trim.
Personally if there was one thing I would drop to make way for one of the above - it would be the sunblinds.
Great spec regardless and nice to see a SB on here - should go with the leather colour you have chosen really well.
Re. xLine, I seem to remember reading mixed reviews on the forum. At the day end its all personal preference though - and its your cash!
Good luck!
PS - I posted something similar to the OP and ended up adding the Xenon's and DAB to my order - but really glad I did!