I'm a long time ImgBurn user and I use only Verbatim discs. Seeing how inexpensive these RiDATA discs where on newegg I decided to give it a try, but your right, you get what you pay for.
However, when you say only Verbatim, +R, 2.4x MKM-001-00 is recommended, what about Verbatim 8x +R DL?