I recently flew a 6m Airush One in some very gusty windy conditions in Tenerife and TBH I never expected much from it. However, it turned ou to be such a fun little kite, super stable, boosts massive and with the shape and one strut doesn't drop you like a stone afterwards. It has a load of depower and the power delivery was not spikey at all plus the feedback was very good (I ride Razors) for what is more a delta shape as I usually find them to be quite spongey.
Another surprise was there was no canopy flutter which I thought would be a problem with the one strut design, but the shape and canopy layout seem to counteract this - and I was really giving it some beans. I'm 80kg and was on a 135 twin tip and think this would work across both styles pretty easy and would let you ride waves plus go out and have some big boosting fun when it really picks up? It definitely sits deeper in the window and does not forward turn with as much power as the VX but you can make it turn progressive i.e. whip it around pivot style or you can make it arc more with a bit more pull depending on how you handle it at the bar. I know I got some pretty big boosts of some decent waves and used a fast downloop to come in and land toeside down another.
The alternative is actually smaller VX as I'm assuming you get a lot of on/cross-on conditions in WA and the forward flying should not be a huge problem - I have had an 8m out here in some 40mph cold Scottish winds so not like the weak assed thermal stuff you antipodeans get
and one of the standout things about the VX is how it retains feel and direct handling even when fully depowered.
If you are buying new and you don't need it right away it might be worth while holding back a little longer to see what the 2013 range has in store