If you have all the variables figured out - good burner, software, system, and competence - then you should have no problems with even cheap media. Where you will see the difference is that cheap media will not (in my experience) "hold" onto data as long as decent media. That is, the data may corrupt or be unreadable for some unknown reason even after a couple of months. It's crappy to lose data for no apparent reason.
That's why I use relatively cheap media for audio and other stuff I don't really care about. I use good media for backups, mission critical data and so forth.
The real goal is to get good media at cheap prices.
Good media: Mitsui, Taiyo Yuden, Kodak among others.
Bad media: CMC Magnetics, Ritek, GigaStorage among others.
Note that many "Brand Name Media" outsource their cdrs/rws and you can get the same brand name media made by good and bad factories. Buyer Beware and use CDR Identifier when you can.
Good luck.