In my experiences, Ritek (G04) has been a solid choice for blank media (same goes for everyone else's experiences it seems)
No bad burns yet with my Plextor 716A with latest firmware...
One thing I will throw out there, is that you may be better off modding your case, or waiting for the new replacement cases, and using full size media...
Full size media is exceptionally cheaper compared to mini media, and you have the luxury of using the discs you buy for anything you want (backing up DVD's, games which use full size media, etc...) Meaning that you can easilly buy them in bulk without questioning yourself about it...
If you plan to go with full size media, I again reccomend the Ritek discs (I have had better luck with the +R media compared to the -R media myself...) and I also reccomend TDK DVD-/+ R's...Really High Quality stuff for a great price (a local retailer recently had 50 packs for $20!)
Well, there ya go, hope some of this helped you make a good decision