A 205/40 could work but honestly it would be so small on that wheel that your speedometer would be way off, you'd be burning through gas all day long from high revs, and you'd run the potential risk of damaging your wheels. Simply putting a 215/45 would be much more ideal. Even then it's not the same as your stock wheels. Right now my speedo is off by about 5MPH when driving at highway speeds. So when I cruise at 70MPH, I'm really going 65MPH (confirmed this with my cell phone's GPS).
Also, I have no camber kits, just natural camber.