They are nice but I prefer the turbo power of the S4. The engine can be tunes soooo easily. For 3k, you can get the car up to 350hp and 390lb-ft with APR Stage 2+ and all that is as a chip and a new turbo-back exaust. I would only really accept an NA engine if it was an M version, which is over 300 hp. Those euro engines do have a nice power curve though.