After experiencing a batch super-cheap Bush-branded CD-Rs from a wholesaler, of which about a fifth turned out to be coasters, I now stick almost exclusively to Verbatim media for dvd single layer (not got round to trying double layer yet). Rarely use CD-Rs or CD-RWs these days, so just whatever's available at a decent price when I need them.
I consistently keep hearing good things about Ritek and Taiyo Yuden too so I'd have no reservations about using them when my current batch of blank DVDs gets used up.