heated seat .. definitely, if you use it in the winter
a/c ... I use mine in the rain/damp to try & dehumidify the cabin ...hmmm
badges .. get them off librand for a tenner & put them on yourself correctly aligned . head rest stitching.. yes
standard seats are fine.. I can sit in them all day
spare tyre .. peace of mind especially if touring abroad. boot rack essential if touring. I use surfing/waterproof duffel bags
audio .. had a system retrofitted .. tunes are essential for me.
exhaust .. how much? the standard burbles nicely in sport mode
warranty .. im now thinking about this too.

ive also got spot lamps .. look cool & give fantastic light on a dark country road.
went for light grey leather interior to avoid red hot black leather in the sun .. however it doesn't half show the muck.

as for telling the wife ... I don't want to go thro' that again !!!!!