The Asus CD-S520 goes for around $30 and is very quiet, fast, and reliable. The Plextor UltraPlex 40Max is very fast, moderately quiet, reliable, and has the best DAE features of any drive (returns the most correct C2 errors). But DVD drives have gotten very good at CDROM reading, and I would recommend the Lite-On LTD-163. It's very fast, moderately quiet, reliable, and goes for around $35.