With my Leadtek FX5600 VIVO and Winfast PVR software, capturing is fine but previewing goes noticably out of sync after about an hour.

I've tried other bits of software which don't appear to have this problem (although they're generally much less user-friendly, like Vdub Sync) but then they always seem to only display a 4:3 picture rather than a proper widescreen picture on my HDTV (connected to the secondary DVI output on the graphics card and using Full Screen Video Mirror in either Clone or Dualview mode).

Is there any software that will both keep sync and display a proper widescreen picture on my TV? If it's user-friendly and has the facility to make scheduled recordings that would be even better, although I can always use Winfast PVR for that.