Datejust White

Datejust White
Which Rolex Should I get?

I come from a well off family so im not lying. My dad wants to buy me a rolex for christmas (im only 18). We can afford it and I want to get a watch that is around 18 000 or less. and I dont want yellow gold, i prefer white gold. I also like the ones that are 1 tone. Which one should I get? http://www.alanfurman.com/noframes/rolex1.html

Another thing is there a big difference between datejust and day-date? There is a huge price difference but Should i just settle for a datejust instead or should I buy the day-date and is it really that much flashier?
p.s. i'm a guy and i dont want it to be like im TOOO bling bling if u know what i mean

Why not take the 18k and donate it to a charity of your choice instead of taking the chance of having someone see a Rolex on you, beat the living snot out of you and take it. And PLEASE don't give me the crap about how you can handle yourself in that kind of situation...

MY watch? Timex E-Tide and temperature.

Two Tone Rolex Datejust with White Dial