Get the NEC ND-3550A. I use the 3540A, it's an excellent drive. You can't go wrong with NEC (or Pioneer, and if you have the money, Plextor).
Whatever you do, DO NOT get a Lite-On. And buy oem (from sites like newegg), you save money.
http://www.newegg.com/Product/Product.asp?Item=N82E16827152058
$34.99, free shipping! Can't beat it.