I have 2 BenQ and 1 NEC. I've been using the NEC a lot lately for burning in general and the BenQ as the reader and it's been doing wonderfully! I'm waiting for my external enclosure to arrive so I can hook up the 2nd BenQ and use that as the primary reader.
Before I had all these DVD-Burners running around I used the Samsung TS-H492A CD-RW/DVD-Rom combo and found that to do a superb job in terms of reading. I can't say enough about the drive although it doesn't do Disc Quality Scanning but really that's what the BenQ is for. hehe