The 555 frame is 1300g the HSC5 fork is 295g, go with the 585 it's only 1195g with the HSC5 fork! Really though I wouldn't get to caught up on the weight I went from a 15lb Orbea Orca (pedals/computer/cages/training tires) to a 17.2lb LOOK 481sl and I'm much happier. Why? Because the LOOK fit me better than the Orbea which is the most important thing.

You'll find the LOOK is going to be a much different ride than the C'dale. I'll racing a CAAD 8 next season and I can tell you the bikes are night and day different.