Vienna Visit

[deeplfo]

Hi Bar,
Lisa and I are thinking of a quick visit to Vienna in October for a little anniversary celebration.  Thinking of hitting those of you who are there, and also try to make it to one or two classical gigs :-). 
Looking for recommendations on hoods to check out, food scene, shopping :-).

Dates are tentatively Oct 18-21.

p.s. what’s the best ticket outlet for classical or opera shows?

Cheers,
Mohsen