other sources for Taiyo-Yuden media include FujiFilm branded discs manufactured in Japan (look for small print near the UPC bar code). Best Buy is a good source for these, and often has the 25, 50, or 100 count spindles on sale.
Maxell media is another good source of Taiyo-Yuden (though there is a chance you will get Hitatchi-Maxell's own brand of media, which is also excellent quality).
I should note, sony set-top DVD players are incredibly picky when it comes to playing back recordable media. (A family member has a sony player, and if you do a bit of reading over at www.videohelp.com you will find many people who share this opinion).
In truth, there is no all-in-one "best" media, as the media itself is only one factor in having good playback. Different recorders work better with different media, a player may work with one type of media when it recorded with a specific burner, but may choke playing back the disc when recorded by a different burner.
Your best best is to try small quantities until you find something that works for you. MCC (Verbatim), RICOH (TDK, Maxell, Fuji), Taiyo Yuden (Maxell, Fuji, TDK - made in japan), and Hitatchi-Maxell (Maxell Made in Japan) are a few starting points.
Keep in mind when buying branded media, you are never "guaranteed" to get a specific manufactured disc (Fuji - Made in Taiwan can also be Prodisc, Maxell - Made in Taiwan can be RICOH or RITEK).