I have two Westsuits steamers - both 3/2 sealed seams - and they have been great. Both are more than warm enough for 99% of WA winter conditions. The older one is almost 4 years old and just a little stiff but great as back up when the other does not dry

I also have two Billabong short sleeve steamers I got on special. The first is a 3/2 and has lasted 3 years so far with a couple of small repairs. It tore at the base of he zip so JAM Wetsuit repairs patched it and put in a loop to grab when putting it on which has given it another year of life so far. Its the most comfortable suit I have ever had and it has never given me a rash so I bought a new one this year, but in 2mm instead.
I also have an O'Neill springsuit that has lasted over 5 years and a Westsuit short john about the same age. These do not tend to have any wear points like a steamer so they last a bit longer.
Now my son is bigger (slightly taller than me) having a few spares is saving him a bit of pocket money and giving us both a bit of choice on any given day.