We have used Carhire3000 (Travel Jigsaw if you want Aussie $). We have used them twice. They are a wholesaler and you don't know which car hire company you are getting until you finalise the booking. We got Dollar both times and they were fine. We did pick up and drop off in LAX though. Not sure they've got a site in Anaheim.
Car hire 3000 includes all of the taxes and insurances that we need from Australia. If you are booking directly with a car hire company, make sure you're on the Australian site, as if you're on the US site, the price won't include all extras you need.
I check both Carhire3000 which is in UK Pounds, and also Traveljigsaw, which is in AUD. check which is the cheapest, dependant on the exchange rate.