Shudder. Generally Sony is made by CMC Magnetics Corp - they make great frisbees.
Check the link in my signature. Forget Brands always look at MID Codes, unless your talking Taiyo Yuden, Verbatim or TDK. Older players like - more than +, but newer players are happy with either. Look here for more detailed info:http://www.videohelp.com/dvdplayers Search for your player and check out what the reports say with media.