We moved our membership system over to Regonline.com. The Regonline (ActiveNetwork) system seems to have started life being aimed at sports event organisers, but it can now cope with simple annual membership payments. It can cope with with optional donations, conference bookings, merchandise etc. Their Merchandise commission is a bit pricey for small items though. They are relatively small, but they do have real people (not call centre operatives reading scripts) who you can talk to in the UK, the USA and probably elsewhere. Overall I'd recommend Regonline.com if it fits with what you need to do. The PayPal subscription system was always a bit klunky, for example it never gathered enough info when people took out their subscription. Regonline has a nice form flow at signup, with data fields you can customize, and it lets members sign in and do some self-service on their subscriptions - something that was difficult and fairly crude in PayPal.
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