Hi and Welcome
This is a great resource and very friendly A2 owners.
Based on memory I would say that many owners like to bring their standard A2 up to the top spec by adding ( in no particular order):
Extras on different models or optional items on delivery:
- heated wing mirrors
- vanity lights
- fog lamps
- under seat storage box
- rear cup holders
- parcel shelf
- spacesaver spare wheel
- leather seats
- radio to CD player
- Double-DIN dash with Sat Nav
- multi-CD player (under the boot floor)
- add DIS (Driver Information System)
- leather seats
- heated seats
- sports seats
- change slatted grill to smooth grill and vv
- under body aero mods (from the A2 3L)
- Votex body kits
- larger rear spoiler (A2 3L?)
Talked about but I don't think it was actually done:
- add Open Sky System
- changing rear drum brakes to discs
Non standard mods:
- remap
- longer 5th gear
- upgraded suspension
- different size wheels / tyre profile
- Sat Nav in that square panel on the top of the dash
- white speedo / rev counter
And non standard mods for the really brave:
- convert to electric - couple of people in Europe
- 6 speed gearbox
Maybe more I can't remember.
Ops, see the list has been done before but it has many non standard mods like DRL
http://www.a2oc.net/forum/showthread.php?23521-The-definitive-Mods-list
Also see Steve B's list
http://www.a2oc.net/forum/showthread.php?24795-My-A2-quot-Top-spec-quot-project-(AKA-my-Holy-Grail