I have the complete IKCA set. In the last year, I've been purchasing many martial arts tapes and DVDs, so I've been exposed to a lot of kenpo on film, EPAK or not.
I'd say Sullivan and Leroux do one of the better jobs explaining the basics of their kenpo system on video, compared to many other kenpoists. If you're not religious about the exact flavor of kenpo you are getting, I recommend them.
I also recommend the newer Jody Sasaki DVD series (not the Panther videos), although I know many of the diehards on MT don't particularly like Sifu Sasaki's interpretation of EPAK. I liked the production quality of his new series, but I did wish Sifu Jody had spent more time going over the minute nuances of each self defense tech. Still, he does a good job of showing each tech from a variety of angles with a couple of helpers as uke, and you can get a general idea of proper motion to follow yourself. If you combine the Sasaki DVDs with the expanded tech manuals from the Lampkin brothers, I think you've got as good of a video/book teacher as is possible.
Obviously, attending a studio is still your best choice.