I've got a feeling the Veyron is a bit better to drive at top speed than the Viper. Besides, I wouldn't call a tuned Viper a production model...
Exactly. It's a tuner car - not a production car and apparantly less than a dozen are made. You simply can't call it the fastest production car ever made compared to the Veyron. Face the fact - that Viper is simply no achievement like the Veyron is, which is built from the ground up to be solid at top speed, drive you in comfort and luxury and handle well around a track even when it nearly weighs two tonnes. I'd have a Veyron anyday.
You can have your $1,440,800 "achievement". I'll take the $225,000 monster that beats it and buy 20 more cars and a fully furnished house. And like 300 is a "production" number anyways. You shouldn't even be able to claim that unless you're making more than several thousand of a model.