I will have to disagree with some of the rich folks above.
Righto Tony, how's your plane running buddy!!
This question to me pulls in all sorts of calls, mainly you risk level for investments.
To the people that say 100% cash or near to it, more power to you, sleep well knowing that what you have in the garage can not be taken from you.
In my opinion, and it's only that, to pay what over here is near a 100K car used in cash is foolish. That 100K can do much better than a depreciating (even only slightly in a Viper's case).
Put it against a powerline on some equity in property somewhere, toss enough down that the payment doesn't cramp your style, and buy it.
Your numbers may vary, in my area 20K can get you into an investment property that will profit monthly (on an average yearly basis) to pay for the Viper payment. To tie up 5 times that amount for something that sits in the garage is not smart business sense in my book. I think it's coined the opportunity cost from my schooling days......
Being single in my late 20's my skew things a little as I have no dependants (that I am aware of!!
) however.
Happy shopping, buy stocks/bonds/funds/real estate and other boring crud for your retirement years now, and have fun with the rest, life is too short for any other plan in this guy's eyes.