Is it just for composite video? If so, I would not spend a fortune. Perhaps something like this: http://www.cablestogo.com/product.asp?cat%5Fid=3108&sku=28746. Beyond that, once you start getting into component and/or HDMI switching, things really go up in price.

IMHO, if it's for non-critical viewing (such as my SMS-1 display or VCR playback) don't guild the lilly.