Best category to choose, or both?

I would like to submit a client site, www.nationalavsupply.com, and have found two categories that they could nicely fit into: http://www.dmoz.com/Reference/Education/Products_and_Services/Equipment_and_Supplies/ and http://www.dmoz.com/Business/Business_Services/AudioVisual/Equipment/

Can I submit to both, and/or should I? Plus, neither has an editor, but the first one referred to above was updated much more recently. Should that factor into the decision? Thanks for the help.

No, you should suggest the site to the ONE best category. Are your products only for Shools. No. I would suggest this site in the Business category you specified.

A listed editor for a category has totaly no effect on the review proces. Read more about this subject in our Faq.

Please do not submit to Reference/Education/Products_and_Services/Equipment_and_Supplies. It will not be listed there. I don't know if it will be listed in Business/Business_Services/AudioVisual/Equipment or not. If that is the best category for your site, you may submit there once.