Congrats on the new purchase - that is an incredible deal for a Cervelo!! I have a 2004 P3 that I absolutely love.
http://www.bikesportmichigan.com/bik...cervelo-p3.htm
His name is Speedy b/c I rode him for the Florida 70.3 this year and he gave me my fastest time ever in a triathlon (avg speed - 21mph!!). The bike just fits me so well. I am 5'1" and ride a 48cm, so don't be worrying about the size. I'm pretty sure the 51 will fit you. If not, I bet you can get a good price for it on ebay!
Getting a new bike is so exciting. Speedy was my last purchase in May (I bought him used from my bike shop) and bought Ruby last October and am already itching for a new bike. I don't need one though b/c I've really topped off what I want in a bike and love them so much. But bike purchasing is fun! Paying the credit card bill, not so much, but worth it!
Keep us updated when you get it and post pics when it arrives!