I am 6'0 and my 08 Look 555 just came in. I have only tooled around the block on it but it feels pretty good. I was meticulous about the research and measurements on it before buying. I used to ride a 58cm Trek 5000 and it was little big.
I run a 90 cm stem on mine b/c I have short torso. The best thing is to ride it for a while and see how it feels. It sure looks nice.