To add to the wealth of advice you've received so far, let me fill in one niche:
Either that or she's really lookin' forward to driving it while you're slaving away to pay for it.
In our marriage this is code for "If I tell you it's OK to buy the freakin' car, then will you stop blathering about it and make up your damn mind and just leave me alone? Fine."The worst part, is my wife has actually told me I deserve it, and to GO BUY THE CAR.
Either that or she's really lookin' forward to driving it while you're slaving away to pay for it.