What about a CTS?

The CTSV can be had for about what that BMW goes for and it has 560hp so it should be able to get up those steep entrance ramps.

http://www.youtube.com/watch?v=aPz9SgoqxCA
Acceptable performance.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200