I run a popular site for which I would like to use a CDN network. So far I have found NetDNA since it is easier to setup with W3 Total Cache plugin.
There is Rackspace Couldfiles and Amazon. But there are also Akamai, Limelight, and many others.
Apart from price difference, is there any other specific difference between them? Is there anyone who has used the services above and can recommend the best one out there?