Well I wouldn't because I think it's a hideous car but if it's what you fancy, fair enough.
Can't comment on the FSI 'S' engine but I did have the 4.2 40-valve V8 S6.
Strong engine that can take abuse all day long but a pig to change the belts on!
Not too thirsty for this sort of car and brakeparts and such were all quite resonably.
The quick Audi's are know for issues with C-converters though, one to watch out for because they are very dear!