So I'm looking to purchase an Audi A4 Avant 1.8L, but I don't know much about these cars, Audi's overall. Can someone give me their feedback about these vehicles? The car I'm looking at has about 50,000 miles, has all the power, leather, Bose speakers, nav, 19" black rims that are aftermarket, all that great stuff, and is priced around $22,000. Is that a good price? Some of the other topics I'm interested in include...

Are they expensive to repair...
How reliable are these cars...
Do they need repairs often...
Gas mileage (I've checked fueleconomy.gov, but what do you think)...
Comfortable?...
Ride?...
Handling...

Things of that such, the practical things. It would be great if you could just pitch in on a thing or two if not everything. Thank you guys, I love looking at this car, I think it's perfect for me, I just need to know the in depth history of this car and what to expect.