Canon EOS 7D Editing

I have a Canon 7D.

My .MOV native files are lagging a lot.
They told me to use Cineform neoscene...
It does a great job, but at the 3/4 of my video, the image stills, and bugs.
Is this a camera problem ? or cineform problem ? I can see a little twitch on the native .MOV file.
Also, I have Premiere and Vegas, what is the best way to render ? Best format ? I tried many, some make to heavy files (30 g for a 6 minutes video), some give poor quality.
I want a great 1080p video. I'm not that good with formats, renders and stuff, please help.
I can't find a way to edit my 7D videos, it's crap !

Thanks.