Lopez,
If you're going to be reselling somebody's service, you'll want to be confident standing behind their product. You'll also want to go with somebody who has an established reseller channel, and a good handle on that aspect of the business.
Take a look at
www.hosts4porn.com
Quite a few of the adult hosts listed in our directories operate solid reseller programs, and even a few established mainstream hosts with big reseller programs have started actively marketing to adult customers and partners.
We also have quite a bit of information about reselling, and some of the things you should look for when picking your partners, and setting up your business.
Good luck.
Liam