At what speed are the majority of you burning your DVD backups? I've been able to burn both at 2x and 4x, but have had more problems at 4x -- and with various media. I'm trying to determine if the media is the problem or if backing up a DVD at 4x is just asking too much. I've tried 4x backups with Princo, Ritek/Ridata G04, Prodisc, and Platinum (sold only at MicroCenter) and have had mostly negative results. Now let me qualify the term "negative." By negative, I mean that the burn occurs successfully, but playback/verification fails. Platinum is utter garbage -- although my first 25 burned wonderfully at 4x. The next 25 presented 18 duds. The Princos performed the best of all, yielding a 85-90% success rate. Probably the most surprising to me was the poor performance of the much heralded Ritek and Prodisc brands. Testing on both yielded a 100% failure rate at 4x! None of the burned discs would test successfully. I even tried burning one of the Prodisc 4x's at 2x to no avail. However, when it comes to 2x media, my burns are flawless (99% success rate). I use Verbatim Datalife 2x media. Unfortunately, I'm not sure if my success with 2x is due to the superior Verbatim product, or if 4x is too fast for video backup. Evidence would suggest not, since I'm able to get good results with Princo 4x's. Opinions, please.