Load full list XML into JavaScript variable via CEWP

Currently I am using the lists.asmx webservice to POST a soap envelope and return specific list items. I really want the whole contents of the list. I realize how large that might get, but if this works the way I think it will, I'll be able to narrow that down.

Current code:

    var soapEnv =
            "<soapenv:Envelope xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/'> \
                <soapenv:Body> \
                     <GetListItems xmlns='http://schemas.microsoft.com/sharepoint/soap/'> \
                        <listName>Produce</listName> \
                            <ViewFields> \
                               <FieldRef Name='Quantity' /> \
                               <FieldRef Name='Quantity2' /> \
                           </ViewFields> \
                    </GetListItems> \
                </soapenv:Body> \
            </soapenv:Envelope>";
        $.ajax({
            url: "https://mydomain.com/Sandbox/bitest/_vti_bin/lists.asmx",
            type: "POST",
            dataType: "xml",
            data: soapEnv,
            success: function(xData, status) { /*DO STUFF*/ }
            });

Now I'm a bit of a greenhorn and I've just learned about the ListData.svc RESTful stuff that SharePoint 2010 will do. Let's say that I want to load the XML response from the ListData.svc service directly into a string. How do I do that?

    https://mydomain.com/Sandbox/bitest/_vti_bin/ListData.svc/Produce

Seems like that will be the better way to go!