Tom, if you dislike V10s then there will be many really cool upcoming supercars that you will also have problems with very soon.
BMW's next M5 will be getting a 500HP V10, and the upcoming Lamborghini will produce their "baby" Murcielago as the Gallardo with 4WD and a 5L, 500HP V10, and my favorite will be the upcoming Porsche Carrera GT with a 558HP V10 also mounted midship.
These will be among the best and fastest supercars out later this year and early next year, and they will all have V10s (and 500HP or better).
As far as abborations go, there is a modified C4 Corvette with a Grand National V6 installed that runs 9.7 sec. 1/4 mile times!
The Viper's V10 motor is one of the things that makes it unique.
And I'm happy that it's not a car for everyone's tastes.
-Dean.