Well if you plan on watching movies and transferring large amounts of information (without using an external drive or flash drive, maybe giving someone the disk to keep) then a blue ray drive could be good. For my last build though I decided that it wasn't needed at the moment and if I want to upgrade in the future I can always add one in.
Here are the drives I'd get.
For the DVD/CD Burner the cheaper the drive the better.http://www.newegg.com/Product/Product.aspx?Item=N82E16827136247
I actually put this one in a build a year and a half ago and haven't had a problem with it.
Secondly if you do get a Blue Ray drive you can decide if you want a burner or just a reader.