Are you trying to start accepting bitcoin for whatever services you want? If so, check out bitpay. You can integrate it into your own site as far as I know, and as a customer of other sites that use it, I've never ran into issues with the system.

If you're trying to do a more shop-like setup, check put rocketr.net. it might not be exactly what you're looking for, but I think it could work as a solution if you absolutely can't use bitpay.