I use Vegas 13 and get a pretty fast render in 720p
Most of my videos are shot in 720p but, if you want to render in 1080p or even 720p once you have your video ready to render well you know, click file render then, I select "Sony AVC/MVC (*.mp4:. M2ts, AVC) and click the arrow over on the left
From there I select either Internet 1920x1080 30p or 1280x720 30p depending on what I want my video to render out at
Next I click Customize Template (All the cool stuff is in here)
In here All I change is my Frame rate from 30 fps to 50 fps
Down the bottom is a drop down box labelled "Encode Mode"
Click it and if you can select "Render Using GPU If Available"
Click ok and then Render.
You will get a much faster render and a good quality HD video at the end of it
This works ok for the vlogs that I make.
Hope it helps a bit