I am using WHMCS, and have an Enom reseller acount. Within the WHMCS admin panel, I select what I want the default nameservers to be for new registrations. Which Nameservers should I use? I am wondering if I should use Enom's nameservers, or my namerservers, for the default of new registrations. What are the pro and cons of each?

It seems to me that I can offer DNS management and EPP codes if I use Enom's nameservers, and I can offer hosting if I use my namerservers.

I want to offer all of these things simultaneously. I think any hosting company should offer all of this. Please advise