Welcome Mr Bump!
Your other half has good taste in cars
Apart from the GT4 Special Edition (which isn't that special apart from colour), there are only 2 specs which are ;
1. GT, with extras such as leather and cruise control.
2. 'Non-GT' which is the base spec with cloths seats, no cruise control etc.
Unless she plans to do upgrades to seats and audio equipment, go for the GT model as it'll be easier to sell come resale time.
The GT only costs £500-1000 more and has the comforts that you really want from a car like this.
Also, the Rays alloys are well worth getting as opposed to the standard rims - they look better and are lighter, believe me you can feel the difference between the two.
Good luck - look forward to hearing about the new purchase!