If you have enough disposable income with which to pay for a new car with cash, then do it. The advantages are in not having to pay any interest on a loan.
The only advantage is you avoid any interest for financing any part of the purchase price. The belief that you can get a better price if you pay cash is false. The sales person loves to hear you say...
My opinion and I've been in the car business for a few years... no unless your looking for a tax write off at the end of the year and your accountant says drop a bunch of money. As soon as you drive...
it is better to have a new car, unless the used car that u were looking at had special mods such as interior, speed, and style. if you have enough money for the new one, stick with that What? Depends...