Picked a 25 pack up of these staples branded DVD+Rs today for $8.95. Figured even if they suck, they're cheap. Not so, they actually gave some of the best results I've ever seen. MID is MBIPG101R04. I burned and read them at 4x, quality when burned at 8x might be lower.
EDIT: I should note that the DVD was only 3.2 gigs-ish. If I burn anything longer or at 8x, I'll post more results.