Free Trial Payment Processor?

I'm thinking about doing a free-trial type of method that all those acai berry and resveratrol companies use: Charge them a small free trial fee then upcharge them later and hide the upcharge in the terms page (just doing a little research on a few products to make sure I don't run into any legal issues)

Does anyone recommend a good payment processor for this type of system?

The last thing I want to use is my PayPal account but I do want a system that allows me to transfer funds to my PayPal account.

Right now I am thinking about eJunkie.

Any suggestions are appreciated

Just spoke with e-junkie and they aren't optimized for this type of service.

Does anyone have any experience with other payment processors?

epoch.com looks pretty good. But they take 15% of your earnings.