The Cervleo's have a life time warranty so if after 6 years it breaks your ok. Whereas the Scott only has a 5 year quarantee.
Buy the groupset online instead of a LBS much cheaper.
Zipp hubs arent too hot, not sure if they have been improved on recently. Lots of issues with play.
Wheels if you want some deep 50mm rims (tubs) similar to the 404 which are about 58mm you could try custom built M5 wheels which would work out cheaper and same weight. I heard a price quoted of 1080 euro's (£735).
Have a look at this link talks about the M5 rims :-
http://weightweenies.starbike.com/phpBB ... hp?t=28936
http://www.m5-ligfietsen.nl/site/EN/
Pic of a Cervelo R3:-
[img]http://i161.photobucket.com/albums/t209/sbc205/cervelor36250006dr1.jpg[/img]
Look 585 :-
[img]http://i161.photobucket.com/albums/t209/sbc205/Look585.jpg[/img]
Scott Addict :-
[img]http://i161.photobucket.com/albums/t209/sbc205/addictetscale001ia3.jpg[/img]
Colnago Extreme:-
[img]http://i161.photobucket.com/albums/t209/sbc205/Colnago.jpg[/img]