Try and demo the boards - talk to john or Andy from SOS
I have a WAM 5'10" (I'm 88kg) and think its a good allrounder, for small waves and light winds. It's fun to change the 5 fin set up, and its a solid epoxy construction.
I have heard the fatal wave is a bit more responsive due to the pulled in tail, but maybe less durable as its polyester - though a heavy glass job.
Good luck getting some wind to demo