That's solid gold advice from Plummet above.
Comes down to budget. If you go down the 2m route, you'd be advised to pick a line of kites that work on the same bar, so you don't have to have a separate bar for each kite.
Note also winter kiting, especially in Vic means gusty wind with a big wind speed volatility (go out in 20knots, it can surge to 35knots then back down). I personally found Rebel kites don't handle gusts very well and if they accelerate over one's head, they then drop out of the sky.I personally found the North Dice a great and forgiving kite for these sort of wind ranges...
Oh and I'm selling a Dice if you're interested ;-)
www.seabreeze.com.au/Classifieds/Kitesurfing-Kites/~tiuis/2014-North-Dice-12-metre.aspx?search=UM0CqGptUCTA$DBKo5xxTzdfXsvsyXot