Only problem you may come accross is that most, if not all WRX's have been abused to some extent. A friend of mine is to Subaru's what we are to Datsuns and has taught me one thing:
When you go to buy one, check it carefully. Look for unnatural tire wear, broken or damaged engine mounts, and most importantly inspect the under carriage for scrapes, bends, and tears. I've come across Subies with perfect bodies that kids have taken off road and ripped to shreads.
With that said, Subaru's make great DD's. I wouldn't mind having a Legacy if I had the space/money for one.