Which Payment Processor to Use???

I'm converting an affiliate site > dropshipping site. Have chosen and set up ZenCart for my cart but want a decent payment processor to go with it.

Ideally I want something with little fees, free to start and worldwide acceptance.

I can't use PayPal because my products are "smoking related" and I don't think they'd like it.

ANY ADVICE HUGELY APPRECIATED!! :dance: