This is a decision that is completely up to you, It will not be neccesary to have a Seperate Autoresponder set up, as all your leads in the systemw ill be emailed on your behalf automatically. But you can still integrate Aweber with your GAZ back office by going to "Account settings" and then "Integrations" then inserting your Aweber List ID into the designated box for it and clicking save. This will enable all your leads to populate over the Aweber as well.