Jord said...cant go past the laird hammilton range,
unlike the naish and SB wich are both great boards too, its alot thinner and built for the waves, its also lighter, so easier for the kids to drag around, and the sizes vary, the 10'6 is 27" (i think)wide wich is pleanty and perfect for waves, and the tail also is thinner there for less volume, and that makes it easy to get those tight turns on the waves.
the naish 11'6 is also great but its a bit slow, but you could probaly improve this with different fins, etc.
the SB i havent used one but the look nice

You're wrong with the dimensions Jordan !

But in some ways, I agree with you, before to purchase a board taking a look at the Lairds and other Surftech SUPs (www.surftech.com) is a good idea ; Lairds range now counts with 4 boards (10'/27" ; 11'/27", 11,6'/29" and 12,1'/31") and they recently added new models from shapers like Robert August or Hawaiian Pro Design.
In your case Cranky, a SB 11'2, JL 10'8 and Laird 11'6 will do the job ; your wife and kids will probably love the full deck pad of the SB and Laird (softop version)
I would recommend a Naish 11'6, Laird 12'1, SB 12'6 and other big boards for bigger guys.
a Naish 10'6 or a Laird 11' will have higher performance in the waves, they keep nice cruising ability for your 74kg, but you'll probably struggle a bit when it gets choppy until you get a bit of practice.
If you want to windsurf your board, then also check the new mistral pacifico wave
you can also check the website www.kenalu.com to get more info about boards and paddles