Seems like a sensible spec choice Sem, it's easy to get carried away and at audi prices it soons gets scary lol!
I've got the Bose in mine and personally i love it, worlds apart from the standard system i had in the MKV GTi and noticeably better than the stock Audi system imo, i also have cruise but had it retro-fitted for £130 so maybe thats an option for you also?
My 'must haves' on top of your spec if i was buying again would be...
MFSW - Use it loads and really like the convienience
GSM preperation - Very handy nowadays and even though you can get a Parrot kit or similiar for less money i love the way the Audi kit integrates with the MFSW/Rns-E/Voice commands/Phonebook in the DIS etc..
Auto dimming rear view mirror - Had this feature in my last 3 cars, daft as it sounds couldnt be without it now
Bose - Sounds great!
Edit to add 20 Spoke alloys - Bargain at £200 as an option imo [Y]