I'm thinking the Paxton kit for $2000.00 is their ball-drive Paxton's.I myself went and bought the ball-drive Novi GSS blower from Summit 2 yrs ago,haven't had any problems,regrets,etc.
The reason I did go with the ball-drive kit was,
I myself wanted to see how well/how fast I could get a Paxton blown car to go and I didn't want to be like every-other-person bolting on a Vortech..I like to be different ya see
.. Next time around I will either go with the Paxton Gear-driven blower OR a gear-driven Vortech as the gear-driven blowers turn faster and are more reliable than the ball-drive Paxton kits are.
So,anyways, to answer your question,go with the Vortech.
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Paxton Blown 87GT