What is the best DVD-Rom and CD-RW

Hey guys. Im building a new computer soon and im going to have a dvd and burner in it and just wanted to know what is the best DVD-Rom(Pioneer/Lite-On ect) and CD Burner(Plextor/Lite-On ect). I don't want a DVD-R because I don't really burn/want to/need to burner DVDs. Also does anyone know THE BEST CD Burner like the Plextor SCSI ones.

Thanks Eddie