>>You might want to try knockback.
>>It combines both and adds some magic. I'm now evaluating and looks promising.
>>http://kmalakoff.github.com/knockback/
>
>What about angular or ember?
>
>Just curious what you've tried and what you liked.

I'm currently testing breeze and knockback. I like Angular, but I'm not capable now of comparing it to the other to, since my experience is just writing the infamous todo app.
My toughts already? They are all good. What they need badly is an IDE tool, so I'm also taking the other route.
I like embarcadero's HTML5Builder, it's a gerat tool