Who do you use to handly your credit card processing?

I am looking to use worldpay, despite the cost because i have had good experience with them in the past, they are run by the Royal Bank of Scotland so they have good financial backing.
I also looked at EPDQ but they are even more expensive + you have to get a barclaycard merchant account on top of their price !!

I've looked at 2 checkout , revecom, hostcharge etc but I think im going to go for a UK based one.