Anything in my sig. is a good media to start with as well as a few others (avoid G05 Ritek).
If you want a good buy look at supermediastore.com, meritline.com, shop4tech.com, and rima.com. Occasionally Amazon.com has something good as well as Newegg.com.
Some people have had problems with meritline and shop4tech. Newegg and Rima are the Gold Standard for quality service and integrity.