Yep. Try some burns at various speeds.
I don't have that burner, but I get good results with YUDEN000 T02 at the rated 8x, and MCC004 at 8-12x usually, although one of my burners does great with them at 18x.
Also, consider clicking the floppy-shaped icon in the top right of the CD Speed window, and saving your scans/TRTs as a .png file - good quality and smaller files.
Edit: I see they're already .png's, but the attached images make the original post look very weird. - I've edited them for size (cropped the huge white area around them!).