Welcome to the club! It's impossible to say whether yours will blow up or not. Odds are it won't!!. One thing you might want to do, however, is to investigate an extended warranty from either the dealer (doubtful but, I suppose, possible) or an after-market one. I bought my 01 three + years ago and got a Warranty Direct top of the line complete coverage package, which covers it up to 100K miles. Cost was something around 2,300 or so, but it covers pretty much everything on the car. Was it worth it? hmmmm not from a cost standpoint since I've YET to have to use the warranty (knock on wood). But the peace of mind was certainly worth it.
I got the car with 23K on the odo. It now has 65+K on it. I track it at least twice a year and drive it almost daily. Not a single problem (ok I had to replace the ignition switch but that was all of $35 and a couple of hours time including going to the Audi dealer to pick up the part). I change the oil and filter every 5 - 7 K miles. I've changed the brake pads several times (for track use mainly and once because the original pads were worn out) And I changed the front rotors. All the above, except the ignition, were just wear items.
Mine, so far, has been totally dependable. Its one of the easiest cars I've ever owned to work on. (Brake pads take, what..an hour or so to change all four. Rotors took about an hour. no big deal)
My advice.. join PCA, look into getting a warranty (after much research as to what kind and from who), read the forums, change oil twice as often as the book recommends, get some good winter tires (I personally like the Dunlop Winter Sport, but there are several other good options) and DRIVE IT! You'll be a happy camper
Bob