P3 is wayyyy more aero than the old Ordu. Not so with the new one coming out. If you can wait, I'd go the 08 ordu, otherwise, P3 will be faster.
If you are talking road bikes, Orbea everytime. Finish & aesthetic are miles above and the ride is extremely balanced. If you want funky handling properties in larger sizes, cervelos are for you (I think it is this way round. One half of their size range handles like ****, weight balance is too far back, so lots of little wheelies uphill. And they insist on the same length of chainstay for every size)