Like picture sets and videos for softcore adult.
What's the best and easiest system I can use for that?

If you're shiping and it's not memberships see www.websitepaymentsystems.com

If it's for memberships you'll need paycom or epoch ?

Thanks, was looking more third party though.

Shipping is not allowed with third party processing !

What about 2checkout.com then?

2checkout.com doesn't allow adult related stuffs.

Is this more digital downloads or will you be sending them a CD? You might check out some of the adult forums for some ideas. If you volume is high enough, 2000charge.com is an electronic payment gateway that might be able to help you out.

If you are doing 100% tangible, where there is shipping confirmations and such involved, and you are a US Based business and not an offshore with a US presence, then you still have options for a traditional merchant account. You shouldnt need to 3rd party.

Paypal will support some adult material (http://www.paypal.com/cgi-bin/webscr?cmd=p/gen/ua/use/index_frame-outside&ed=mature) as well. But if you use / rely on them for other needs, I would not recommend using them for it. They would not distinguish between both of your accounts.

only netbilling.com can help you

MultiCards does also allow merchants that sell Adult tangible goods. (DVDs, videos, magazines, toys, etc.)

There are a few different ones that can help you of course - not just one. But an adult forum like gfy, etc would give you a few different options / ideas as well.