The videos if yours I've seen in the past were pretty good, but they had that interlacing business going on. Was that in your conversion software or was it in the hardware?
I've been on the lookout for a capture device for the last decade or so. There is never one that looks good enough in my price range, and, as you said, I can never find decent reviews. They only mention convenience features or what extra adaptors they needed to attach their Handycam or whatever, not the important stuff.