Hammie dude - I still reckon the pink kite is for you

and welcome to SB but...
Go the 10 0r even 11 for your weight and remembering our winter weather can be gusty light crap which leaves most struggling on 10s
There light and turn fast - combined with the depower, you have a huge wind range....
If I had a dollar for every time Ive been out on a 12 (80kg) and seen people do the walk of shame with 9 & 10s etc
thats winter for ya