What do you mean by real processing company?

A reliable Payment Gateway for internationnal custommer is: WorldPay.

But their rates can be a bit heavy for small companies.
Then you can begin with 3rd party processor as 2CheckOut or EchoInc or PaySystems.
From what i know only 2Checkout accept imternationnal custommers.
The only disgusting thing with these processors is that their name will appearing on the Bill and not the one of your company, but does that justify to pay 400% more ?