Go to OM. They have this drive for $229. PM with DELL using the 20% off link for $135.96. Then use the OM $25 off $100 coupon. This should get the drive to $115.96. Then there is a $50 rebate from Yamaha! Making this a KILLER deal. (If it'll work)
Here's your rebate:
Rebate
Here's the DELL link: (you need to do a search for "16X" to find the drive)
DELL