I know this is the wrong time of year for you lot down under to get a winter suit, up here its starting to get cold though and my old one has so much black witch repair glue around the crotch (seat harness.....too many knicks in the single lined smooth neoprene) that its a bit embarrassing to wear now.
I won a simmer wetsuit in a GPS speed competition and have done a mini review of it on my website here -www.redsurfbus.com/2011/11/simmer-543-winter-steamer-wetsuit.html
I know a couple of people who used the summer ones this season as well, they are really well designed for the windsurfer, with well thought out measurements on the upper arms.