Well after a lot of shopping around, seeking opinions, i've decided on my high power DSO eyepiece, which will also be more than suitable for lower power planetary when the seeing isn't great.
I bought a 7mm Pentax XW from Star Optics in QLD. I compared their price with some recent astromart ads, and by the time I had it shipped to Australia, paid paypal fees etc, it literally worked out the same price to buy brand new locally.
I've used John's 7mm XW quite a few times, so I know how good this eyepiece is. It's my first big budget eyepiece so I can't wait to get it.
Thanks to Chris from Star Optics for a quick, no-fuss transaction. I got a good deal and it's being shipped this afternoon! Can't ask for much more than that.