A third vote for www.newegg.com in the USA !
Many of my PC's components came from there:
- Prices are the lowest ~80% of the time.
- Free or low cost Fedex Shipping
- Items shipped out quickly (in fact, unless you have a critical need, don't do the "rush shipping fee" because they usually get orders out the same day IF they are single in-stock items (like a spindle of media).
- One-Day-Sale items can be especially good deals.
It is a particularly good place to buy CD/DVD media because they have customer reviews, and their customers are geeks like us who post the internal factory code for the media in their reviews when they receive the product .
While we know that the particular spindle you receive may not be the RICOHJPNR01 that was described by an earlier purchaser (for example), nevertheless I find that for USA residents, NewEgg is the best shot for getting a particular factory's media, and at a very good price, too.