Searching for better insurance

We have been with our insurance company for some time now but not sure if we are getting a good deal so I would like to research and see if there is anything better out there for us.

We need to insure:
Home Building (1 home but soon to be 2 and then more in the future as we are building investment properties)
Home Contents
3 x business cars
1 x personal car (1974 Ford Falcon GT351 replica so will need to be someone that insures old cars)
Business cover (to cover trailers, tools and the major items)
Family Health Cover

So we have a bit to insure! I would love to find an insurance company that will cover everythingi n the one policy and take out only the one payment, not millions over the course of months/quarters.

Does anyone have any recommendations or know of a site I can go to and compare all different types of insurance companies??

Maybe search for an insurance broker in your area? I know DH with his business actually pays his premium to a broker and they just pay it to whoever the most appropriate insurance company is at the time. When he's made a claim for damage to his van and a tool theft, he paid his excess to his broker, and it was just like your typical insurance transaction. I know at work we used to use a broker, but I don't know if they do home and health insurance too. HTH.