Right now, I'd say Epoch is your best option because their new system cascades. So if the sale is decline by Epoch, it'll go to ccbill. That will increase your revenue. But I believe ccbill is debuting a similar system shortly. (I might be wrong there.) Verotel, in my opinion, is a "only if you have to" biller. They've also had some problems in the past and they process for some pretty questionable stuff. I'd stick with Epoch or ccbill.

Epoch also has more options for European customers who don't always use or have credit cards.

Michael