I own the 5 watt iCom IC-M23 which I purchased from Whirworths:
www.whitworths.com.au/I purchased it as I needed a lightweight, waterproof VHF with decent range for long distance seakayaking.
Sailing in Moreton Bay I can pick up channel 16 from the VMR stations in Maloolabah right down Southport.
In my kayak, being a lot lower to the surface, the range wasn't so good but on the repeater channel 81 I could communicate with the Redcliffe Coastguard from Caloundra, Tangalooma and Peel Island.
Interestingly, my first iCom died as water made its way in during a rather unceremonial dumping in the surf at the top of Bribie Island and Whitworths were happy to replace it with a new one.
Happy shopping.