We agree Goldcar are no doubt the best company with regards to condition of vehicle etc.
However having hired a car ever time we come out and have done this for c5 years we have found shopping around you can often save a considerable amount and if you are luck you get Goldcar appear on your voucher, without going direct but with a big discount.
We have experienced a few scratches and even signficant damage when hitting a fox on the E15 at high speed but never has the various companies requested damages! We are safe drivers really!
Some sites for you:
Goldcar.es is the direct website but others for you to consider are:
Prices do very week to week and month to month we are out at the end of the month and by waiting a few weeks we have saved around £60 on a fortnights car hire.
Always ask for the basic economy model and often you are upgraded.
Finally, carhire3000 is a good one because you can cancel free of charge so if you find it cheaper later you can cancel and re book but still have reserved the initial car as a backstop.
Hope the above is useful and good luck