Looking for VGA adapter for game console

[Jamin686]

I'm looking for a good VGA adapter for my gamecube to connect to my PC monitor. I'm looking at these three right now. Does anyone have any suggestions? I don't know much about this and I'm having trouble finding good opinions on the subject online. I want to go by the reviews on the websites but for whatever reason I don't think they're completely trustworthy sometimes. If I use any of the following, will I get a sharp, clear picture? I'm not going for pscan, I just need to be able to play my gamecube on my monitor (17 in. crt) with s-video. Will it be as sharp and clear as it is on my tv?

www.lik-sang.com/info.php?category=219

»www.consoleplus.co.uk/product_info.php

http://www.lik-sang.com/info.php?category=219&products_id=3166&&likref=compcharts