I do. Once I see good results across a few burns, there's no reason not to keep getting that media. The only reason to switch would be if you can't get that brand/manufacturer anymore, or if saving 10Â¢ per disc is vitally important to you.
Will tests with the same media on the same drive vary greatly?
Generally speaking, there's usually very little variation. Sometimes a manufacturer will produce "bad batches" or move production somewhere else, or even change the dye they use (Verbatim!) - and sometimes the top & bottom disc on a spindle might not be as good as the ones in the middle - but you should expect consistency.
What is the actual "purpose" of testing? I have probably burnt 2000 dvds with various software with my Pio DVR 107 f1.21 and i have never tested ANY thing ever, but i visit many forums and it seems that many people are always doing test. I would just like to know why?
Depends who you talk to and how they regard their DVD writer. Remember the audiophiles who used to strive for 0.0000000001% Total harmonic distortion? No one could hear the difference between that and 0.01%, but to them the numbers mattered a lot. Some burner owners, especially here, take that same "hobbyist" tack and seek the Holy Grail of 0 PIE and 0 PIF.
I use media code YDEN000-T02-00 and RICOHJPN-R01-02 and have never had any problems.
Nor should you. Reading across the different burner hardware forums, you'll see that almost all burners really like those two MIDs, and independent of which brand they are manufactured under (Memorex, Ritek, Maxell, Fuji, TY etc).
I will run a SUM 8 test on both written media and post back the results in hopes that someone will shed some light on them, thanks again and i have enjoyed reading the posts in this forum, it seems there are some very knowlegdeable people around here.
The ones you posted look really good. I'd be very happy with that burner/media combination.