What is the best third party payment processor?

Hello everyone! Just joined this forum. I am thinking about starting a new online business, and would like to use something more professional than just Paypal. Does anyone have any ideas?

I have heard good things about Clickbank, and some bad things about 2checkout. Any experiences or opinions?

Well I suggest to use PerfectMoney because it has less fees and easy to use.But they don't accept members from US.

I don't like PayPal but I love AliPay.

I think BTC is best,PerfectMoney I have, but the Americans don't have.

For me, I'd still choose paypal over the rest simply because they are are widely used in different countries and they are the only payment processor accredited in my country to do online payments, withdrawals, and transfers...:)