got a Benq and heard about how good it was and that it preferred +R. So when BB had a sale on Verbatims, I stockpiled about 400-500 (Costco frame of mind) and also ordered a 100pk from Supermediastore. Recently, got around to the 100pk of -R and 2 out of 3 had dye defects that showed up AFTER burning. My other - R seem "OK", but not great. All of the verbs I bought were MIT. Unless you can find MIJ Verbs, don't buy Verb would be my advice.
On the other hand, all of my TY's (original/genuine A or B grade) have been fine. If you have a Compusa local, check out their supply of TDK -R. The one's I picked are TYGO2 (-R) and MIJ. They seem pretty good cept for one bad disc. The +R are MIT and walked away from them. You can usually tell TY's by the type of case. TY's use a case with no "lip" on the bottom. If the top case has little flat tabs that interlock with the bottom, then these are NOT TY's (at least in my experience). You really can't go wrong with Genuine TY media