From the OP's earlier post....... "Thanks for the input guys. We have a lot of current around here along with wind. I am also docking often with limited help. A thruster while not necessary very often would bring great peace of mind when docking in tight areas with less than ideal conditions."
PSW, one thing I never, ever heard a boater say is "I wish my bow thruster had less power". Don't skimp on the size/power of the thruster. Biggggggger is better when it comes to thruster power.
Another aspect to why a thrust is nice in our area is we don't have wood pilings to utilize. Often when I am going into a slip while on a fishing trip or vacation we have a single berth for two boats. When backing in if there is a cross wind and current you don't want to touch the boat in the slip next to you and while you have full control of the transom backing in the bow is more difficult to control. A thruster will be helpful in this circumstance. I would imagine I will use thruster only 30% of the time when docking and not at all when going into my own shed. Fuel dock I always go to the down current side and it has 2 knots or more running across under it at almost all times. Our tide swings are 7 to 10 feet on most days so that and wind going same direction can make a thruster a big plus. I ordered an SE100 24V Side Power Thruster.
To see pictures of PSW's thruster installation, go to this thread: http://www.yachtforums.com/threads/40-cabo-bow-thruster-installation-pics.29171/