Payment mark - is that part of the Paypal module?
The one that is best supported is: http://www.onestepcheckout.com/ - at least I see it mentioned in all payment modules we use. They also have a responsive design that works very well, placing all columns below eachother.
One I don't recommend is MageStore OneStepCheckout. It's horrible code and upgrades don't improve the situation (some vendors you see they learn from feedback over time - this one doesn't).
If you choose to go with another, first check the money-back guarantees and if you have ample time to test it within the period the vendor specifies.
