At first glance, I’m likely to suggest the Sony media, as it seems to do OK with LG drives. But then again, Ms. Arachne above hasn’t had much issue with MBI media either. I don’t see much better available, though, so that’s your best shot.
Flashing these days with most of these drives usually goes much better. There aren’t too many flashes that fail just from failure. It might be worth a try. That is, of course, assuming your drive doesn’t have the latest firmware [which I don’t know right off-hand].