Look at the -R tests in the new CD Freaks Mad Dog review. There are two CMC MAG. AE1 tests there, one Memorex-branded, and one Teon-branded. Look at how the Teon did compared to the Memorex. That was what gave me confidence in Teon despite it being a generic brand. It's probably mostly luck, of course, but I've so far had two very good Teon spindles.