Probably a bit late, but never the less, I have a Cervélo SLC-SL and it was/ is a great crit bike as it is fast and turns on a dime. It was pretty twitchy though on descents and throw in some crosswinds whilst descending and it's not fun (not for me at least)
I was reading about Colnago bringing out a new bike (the C59) and from the specs it sounded like it would suit me, so I ordered one and haven't looked back since, it is the nicest thing I have ridden, it's a great all-rounder, it just seems to do everything well. It might be slightly heavier than the Cervélo, I haven't bothered weighing it properly, I guess it all depends how you dress them up. I had the SLC-SL pretty light, but had to pack a bit on it to race anyway so I don't really care about that these days (a sin to some perhaps) but I'd just prefer to ride faster and more comfortably (in different conditions).
To put in perspective, I liked the C59 so much I bought a spare, just in case it was stolen/ crashed and I would be without it whilst waiting for another to arrive, or heaven forbid they stop making them when Ernesto departs.
I do look enviously at the new Wilier, but I can't quite justify another spare bike...