I just pulled out my Cervelo book.....
The dual comes equipped with Ultegra as standard.
I have the Cervelo Soloist 105...it is very nice! Yes you can actually hurt yourself on the trailing edge of the Seat post...be careful!
The difference between the 105 and Team soloists is basically: the seat tube is fatter and more stiffer near the bottom bracket on the Team, and it comes with the Circuit wheels and Ultegra. Only a top level rider would notice the stiffness difference.
The vista wheels on the 105 actually have deeper rims than the circuits...these are OEM wheels and you can't buy them off the shelf
for a full line up go to
www.cervelo.com
http://www.vectorstar.net/~porsche/RC/BJ/
Cycling maniac, I am unfamiliar with these races, or your bike. Could you tell me a little about your bike, and what these races involve, and how competitive you want to be.
Regards,
Brendon
P.S. pic is the dual.