If you guys are primarily concerned with racing or dyno bragging rights, then this Maggie kit probably isn't intended for you. This system is intended for those who actually like to feel the gains every single time they drive the car, regardless of what mph or rpm range they are in. As a current Paxton owner, I can tell you my Viper is flat out BORING to drive until 4,500 rpm. It feels like any other stock 11.9-12.0 car, which looks faster than it is. My Cadillac is more fun to drive than a stock pre-08 SRT Viper.
If racing is your primary concern, go ahead and spend the big bucks and build the forged internals engine, turn the boost up to 12+ psi, and have at it. Twin-turbos should be your target here, they are proven to work the best on these Vipers.
For those satisfied with 700 rwhp or less, stock engines, and instant throttle response and the feeling of adding 2.3L (or bigger) to your Viper V10, this Maggie will be the kit for you.