Do I need PayPal Payflow Pro with Pro Sites Plugin?

I do not care if my users are redirected to PayPal to process their payments. With that in mind, do I need a Payflow Pro account? I have already purchased it for $99, and it will cost me $25 per month. Maybe I can cancel and get a refund, since my account is still in test mode. Will PayPal Express work with Pro Sites?