Colin Chapman was doing the Lord's work when he crafted the brilliant Lotus Seven. Some 57 years later, there are all manner of interpretations of the man's ethos. We took three of the best, the Caterham 7 S3, the Lotus Exige V6 Cup, and the Dyson Racing Caterham SP/300.R to Sonoma Raceway, threw Jack Baruth the keys and stood back. Here's how it shook out.