Both WRX and Audi in the same year and mileage as the Turbo Cobalt I ended up picking up were easily $8-10K more than the cobalt. I got an 08 with 54K miles, clean title and extended warranty through GM (cost me $50 to transfer it into my name from original owner) and I paid $12K... 08 R32 was at least $18K, with lower miles easily over $20K.. Same story with STI and even higher price tag with Audi.
AWD would have been nice though. On a side note, are you actually considering selling your Aveo for 6K?!