Fuel Tank Replacement

[rericg]

I really enjoy the site and all the inspirational photos.

I have a 1979 23' CC which recently developed a slow fuel tank leak (about a cup every 2 months appears in the bilge). The tank has a 100 gallon capacity. I need advise on my options from the "field of experience". Do I try to repair or replace? What is the best way to do this? What type of tank is recommended, aluminum, plastic, fiber-plastic? What are some good resources for tank purchase? (Have a quote from CustomMarineFuelTanks.com for almost $800 shipped). Any helpful hints on the entire process would be very much appreciated.