PayPal is a good choice. Like the others pointed out...it is fast, easy and secure. Someone once called it the Fort Knox of the internet. What i like is that they store your credit card details but no-one else gets to see it. It is a fantastic way to pay...
I prefer using PayPal because it is way safe than exposing your credit card information. You must have seen the trends lately on the internet where most sites and people's credit card information is stolen just like it happened to tigerdirect.com. So just imagine how much damage can be done your credit card information.