I have very few options on my S-line A4...
I would have liked the interior light pack and the storage pack - especially the boot liner and hooks.
In retrospect I would not have had the diesel engine (would have had the 1.8T or 2.0T if budget allowed) and I wouldn't have the s-line suspension - it's not too hard, just very bouncy (it feels oversprung and underdamped) and body roll isn't well controlled. (I drove a SE recently and think it's better.)
(....and in another thread I mention that I don't get on with the s-line cloth seats - I hope you find the leather ones are better!)
Cheers,