Hi Ben,
Next time you are at Kurnell, you can try out Eurotrax rollers under your Mossie. Then you can try Will's and a few others at the club.
This way you can make a more educated descision. If you are happy with cheaper units then go for that. If you like the feel of the Eurotrax and are willing to spend a bit more for less strain, then I can point you in the right direction.