OM = Original Manufacturer (Ahhh - darn, never expected OfficeMax to be the abbreviation! Please ignore me, hehehehehe!)
Mad Dog MD-16XDVD9 is a rebadged NEC ND3500AG but the Mad Dog MD-16XDVD9A2 is a NEC ND3520A - make sure to check your text carefully in the model number before buying the drive. $99.99 a bit high but if you really want a 3500 that is going to be your best bet.
For +R media the BenQ DW1620A is fantastic. Heck, the BenQ is good on -R media as well but if you want two drives I'd suggest the BenQ DW1620A and LG GSA-4163B. The NEC drives since the 3500 just don't appeal to me quite as much anymore although I will say the 3520 doesn't seem to be a bad drive the little bit I've used one.