Web to Lead - Group Notification

Web to Lead - Group Notification

Hi All,
 
Hope you are well, need some help with creating a mass notification when a web lead is created. We have different products that can be selected on the web lead form - depending on what product is selected I would like to notify a specific group of sales people that a new lead has been created. This will then enforce the Sales People to quickly access the web lead, approve it and then update its status - and lead owner to themselves.
 
How would one do this, considering we running the professional version - and it seem that you can only create an assignment rule to a single employee.
 
Looking forward to your responses,
Regards,