As car hire prices can change all the time and you can sometimes get a compact car for the same price as an economy car it is vital to shop around and not just go to one or two sites. If you use travelsupermarket.com's car hire service and choose any car type you will be able to compare prices and car types from over 25 different providers in one go. The prices you see are live prices and all you need to do to book is click through to the provider you want to book the car with.
travelsupermarket.com includes all the main brokers such as Holiday Autos, Auto Europe, Easycar, Argus Rentals and many more plus the large direct suppliers like Hertz. On the site there is also a booking tips section which give you vital tips on what to do when hiring a car.

Good luck and have a great holiday.