Mitsubishi 10x/12x CD-RWs are great. I use them at my writer's max rewriting speed (10x). As for CD-Rs frankly I haven't got ANY problem even with the cheapest ones out there. All of the 24x rated media I've tried work at 24x without a hitch. But I mainly use Sonys and Samsungs. For very cheap media, try Datalife.