Two great payment gateways. That can easily be integrated into your web site. Enable one or both!
Option 1: Sage Pay Form A simple encrypted form submission post from your website to the Sage Pay systems, the shopper is transferred to a payment page for the card details to be securely captured. Because Sage handles the payment process for you, no SSL certificate is required on your web site. After the customer completes the payment, the order is confirmed and the user is taken to the ‘Thank You’ page on your site.

Option 2: Sage Pay Direct now supports tokens and will allow your customers to save their card information for faster checkout. See here for more information

When using Direct the customer stays on your site for the entire transaction, so an SSL certificate is required.