I've actually gotten pretty good -R burns on my Litey. PI avg of around 10 for G04 discs.
But that's beside the point... considering that your Plextor burn (which I noticed that you have just removed for some reason) turned up with the exact same results, I wonder if it might be media. Is this a genuine Maxell or could it be counterfeit?
Whatever the case, though, the scan is still good. Well within acceptable limits, esp. the PO. You're fine.
Edit: oops, cnlson, you're right... he removed the LiteOn burn and kept the Plex burn... well, whatever, the scans of the two burns were virtually identical anyway
Edit 2: just noticed that he spun off the other scan into a new thread (why???)...