[Gravter]

New will depreciate very quick, but only if you plan on selling it in the first 2 years. If you trade/sell before that, you'll be owning more than you can sell it. After owning it for 3 years, you should be fine, but even better after 4 years.
When buying new, you can have it EXACTLY as you want, as long as you can afford it that is.
Also, when buying new, you can get 0% financing and other incentives.
Used is a great way to save for sure, but you never know how it was treated, unless you know the previous owner. I haven't bought a used car since 1995, and I'd have a hard time to do it again. I've been lucky with my new cars (4) since 1999. I know I've wasted some cash on my last one since I only had for 14 months, so I took a hit, but I knew I was getting a great deal on my new '07 ST ;).
Oh, and with my ST, i'm getting between 29 and 35 MPG. It's hard to stay off the throttle on this thing, lol.