To save you MUCH rendering, use the AVCHD-1080i60 as long as your cam shoots in the full 1920x1080.
I use the HF10 as well, and use the AVCHD-1080i60 and it works much better than before that option was available and I had to use the HDV setting. With the HDV setting, I had to render every single time I did ANYTHING on the timeline, even moving a video over. Now, It is just drag and drop with the new AVCHD setting. No extra rendering.