I mean where can I find a good credit card website if I want to run a web hosting company. All the customers' order
will be processed via credit card company and I can get the
money fast. And also the commission for them is lower.

check out:

http://www.authorize.net
http://www.cybercash.com
http://www.echo-inc.com

charge.com look pro and have great rates.
never tried them