Personnaly, i tried with paypal first and when you are at the front of a custommer that is ready to buy, you're already nervous because you want to be sure to close the deal and after tried to setup the payment, paypal is first asking the custommer to link a credit card and refuse that credit card for an unknow reason and after tried with another card, it's asking to proove that the custommer is really the owner by printing a sheet and sending a fax with a copy of his driver license and other crazy stories like that, believe me that you will never want to look stupid like that again and you will never want to use paypal anymore for big recurring payments and big deals.
The same with plimus that's telling you they need to validate the transaction over the phone before accepting it and 3 days after, they're calling the custommer at 3h a.m in the night and after you've beeing really frustrated and told them that they need to call that specific person at this hour and they talk with the wrong person because it's the first one that answer the phone and they refuse and cancel your payment... You will remember what i was telling you to do...
Dont loose your time with these payment processor if you want to do serious business and go to your bank to ask them about mobile or virtual terminal.
I'm telling it to you.. I know what i'm talking about...