I badly need some advice. We just upgraded from analog cable TV to HD. In the past I have had good results with removing commercials from captured video and converting to avi format. The process has been easy and fast. However I've had nothing but bad luck with HD. Rendering time is through the roof and the results have been very poor. What's the right way to do this?

Thanks!

Old system
BeyondTV (MPEG2)
VideoReDo (MPEG2)
VirturalDub w/MPEG2 v1.6.11 (convert to xVid AVI)
xbmc for playback on TV

New system
Tivo (@720p)
Hauppauge HD PVR (AVCHD)
VideoReDo (conversion to MPEG2)
VirturalDub w/MPEG2 v1.6.11 (convert to xVid AVI)
xbmc for playback on TV