We have two pages in our application (version 6.7.1) that have a single web page

That is a valid approach but remember to handle the left over processes, after the user opens the new web page they could forget about the process and not complete it gracefully. Consider timer exceptions to ensure the process completes.
Personally I would use the new rule backed record types, you could create a record for each of your URL's and have a SAIL page that displays information about the web link (description, created by, last update etc) alongside the link itself. It may involve an extra click but perhaps provides a better UX and there are no unnecessary processes.