I've never bought blank DVDs online, so I cannot comment on this vendor. I did notice that deals on good blank DVDs at B&M retailers have become more frequent over the last couple of month (usually at ~$0.40/DVD). However, it has become harder (but not impossible) to find Japanese-made media locally.
Some brands that I have gotten recently include Sony, TDK and Fuji. I look for "Made in Japan" spindles which are always end up being TYs for me. Some TDK 4x +R Taiwan-made media I recently bought was Ricoh media and burned at 6x on my stock ND-2510.