Do you want Penrith or St Mary's? I use The Professionals at St Mary's and have been very happy with them. The rate you quoted is usual for just one property, however I pay considerably less as I have several with the one Agent.
PC, speak to Terry Hansen, tell him Nathan Birch sent you, he is owner of professionals. They live up to their name in that office. there are others on par in town, however out of the ones you mentioned they are the best.