i am from belgium and want a new frame,
i have a six13,at moment
the new super six looks good but i dont no de weight of this frame.
what is the best frame at moment?
I'm biased ... stick with Cannondale!
Only warning I'd give is to say will you enjoy full carbon after riding a Six13? I have a Six13 myself and every time I've ridden carbon - although admittedly not any of this year's carbon bikes - I've felt that the rides are "dead" compared to the lovely, lively feel you get out of a good alloy Cannondale. And that comment applies irrespective of whose brand bike it is.
If you're looking at a Scott, make sure that you check one out in the flesh. Push the tubes and see which ones flex under your fingers ... then decide if you can live with a frame like that or not (I was really keen on a Plasma TT bike at one time until I gave it the push test like that ...)
I also found Treks to be particularly bland and uninspiring bikes. Hard to describe other than to say that every time I have ridden one (be it road or MTB) I've got off and thought "well that's 20 minutes of my life that I'm never going to get back again"! As I say - to me they are bland and uninspiring ...
As I say, these are my opinions. No doubt there'll be some people who'll agree and others who will disagree - and I'm sure some of the latter group will start attacking me personally for my posts (try not to - it doesn't help the OP in their decision making). At the end of the day, as I'm sure you know - the best bike is the one that you feel most comfortable on ... whatever the brand ...