If it's your own place, that you plan to own for a while, you have a lot of options depending on your budget, room, and conditions. If you get a lot of boat traffic and/or wind that beats the boat up in the slip, the best thing to do would be to try to keep the boat off the dock as much as possible. My suggestions in order of best to least protection for your boat would be:
1) Lift System - Very expensive, but sweet! My cousin has this model on the South Shore of LI for his boat, and it is a real nice setup.
http://www.davitmaster.com/5_cradleLifts/aluminium.asp
2) Mooring Whips - Relatively inexpensive, easy to install, and really keeps the boat away from the dock. This would be my choice on a budget.
http://www.mooringwhipsales.com/mooring-whips.htm
3) If you are in a busy area or it is windy, at a minimum, I would either install a couple more pylons so you can secue the boat up on all 4 sides, or
at a bare minimum, sink a mooring anchor across from the dock at about midships, so you can tie off a midship line to keep the boat off the dock.
Lastly, attached is a link to Overton's where you can check out several ideas.
http://www.overtons.com/modperl/product ... wse&aID=25
Meanwhile, the fire hose is good and is certainly better than rubbing up against a hard surface. Even the hard rubber or PVC systems used to line the dock will mark up your boat, and chew up your hull tape striping if you bang up against it enough. We have the fire hose set up at our marina and it works fine.
Good Luck. Post some pics as you are building the dock!