Why dont you use Both, and then ever throw in CCBill or PSW at the same time
With the mpa2 program you can use 3 processors cascading. If one doesnt take the customers credit card the second processor might, or the third one.
http://www.mansionproductions.com/mpa2.html
And not only that, but from your admin panel you can change who you want to have first, second and third in the cascading everyday from a drop down menu. This way you can test who will give you the best sign up ratio.
Cant get any better then that !

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