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Originally posted by: Tael
Scyth3r - The Viewsonic VB50HRTV is an upscan convertor. A VGA box would be something like what the Dreamcast had, where you actually get a true VGA output from the console. If you look at the Atarilabs' Video Primer, you'll see that there's a noticable difference in quality between RGB and S-Video. I think that for $100, it's money well spent, considering you don't need to have your PC running at the same time.
It seems that I was wrong about the Viewsonic VB50HRTV being an upscan converter. Doh.
However, a VGA box is not simply what the Dreamcast had and can make use of. For example, LikSang offers a VGA box that works for the GC as well as other consoles but it doesn't really do much other than let you play the GC on a monitor, sending nothing more than a VGA compatible signal. It doesn't improve the qualty of images or such at all. However, I do suppose what the Dreamcast had can be considered as a "true" VGA box.
Personally, I do not consider the quality difference worth $100+, especially when it can not do progressive scan. Furthermore, it simply can't display stuff that isn't there, as w/ the Viewsonic VBR the video will be sent in w/ an s-video cable at best. It just doesn't have enough to work with. It will furthermore lose some quality through the pass-through, and it will remain somewhat "fuzzy" as compared to a TV.
Again, you're not going to find much difference in terms of video quality from those VGA boxes and an S-Video TV card. Unless, you're looking into better upscan converters which do take in RGB but will run $200+, and still can't do progressive. You should check out the XRGB-2plus review at IGN to understand what I'm saying.
I would personally go for the $40 progressive scan direct cable and get the MUCH improved video image and the sweet 60 fps glory and for the other games just stick to either a basic VGA box or TV-Card that has S-Video. But I suppose that is all relative to the individual.