Most of the apps are paid apps.
This is a discussion on Best Remote Desktop App within the iPad Apps forums, part of the iPad App Store category; Most of the apps are paid apps....
DW is a CS5 tool, it is not a remote client. However if you need quick, snappy no lag remote control, Splashtop takes the cake. This should be important in the editing world(no lag). Also if your partner needs to survive a reboot for whatever reason, go with Logmein(ignition
I would recommend deploying on premise remote support appliance such as RHUB or Bomgar appliances in order to establish remote connection between iMac, PC and Mac Pro server. It is only one time cost as compared to hosted services.