I'm not going to bust your stones here, but if you want to see test results to back up the claims these guys are making, there are areas of this forum that deal with just that. Feel free to check it out.
If you get good results from using a particular brand of media and you can get a great deal then, by all means jump on it.
Considering these folks have put the time into testing the different brands and posting the results, I trust them. Another thing is that most of these people have been doing this since the first dvd/ cd burner first hit the consumer market. If you don't trust their opinion, that's fine. No problem.
I personally don't have the money to go with a media that I can't get guaranteed results. I've tried Memorex, because it was on sale (and before I found this forum) with mixed results.
After that fiasco, I've used Verbatim and Sony media for the past 5+ years with no coasters to date. I still watch for the sale, but I always stick with brands that I know give me the most for my money.
Dude, don't think I'm raggin' on you or trying to say you didn't get good results with the Memorex that you used, I'm just sharing MY experience.