Reliabilty issues with Audi?

I'm looking for a new car and I love the A4 quattro. After doing some brief research, I'm a little hesitant to get into one. I can't afford a new car, so I was looking for a 2005 or 2006 with around 50K-60K miles on it. It seems that people start complaining about the cars at that range. I expect to do most repairs myself, but can't afford thousands and thousands of dollars per year to keep the car running.

Should I check these cars out or look for a more reliable (less fun) car?