Do keep in mind...

I hear it endlessly debated, but in my own experience, switching between certain brands of tape can really clog up the heads on your camcorder/deck because the lubricants used on different brands can interact with one another.

We use almost exclusively Panasonic DV tapes, but when we've run out and used Sony tapes we bought locally, we almost always have to clean the tape heads within a few hours of use. Ditto JVC. But I understand that if we didn't switch and used only Sony or only JVC, then they'd work fine.

Of course the exceptionally well trained and knowledgeable people at Best Buy insisted to me there is absolutely no difference and you can interchange at will...