ejmack, I'm 81kg and have the 122. I'm the low end of intermediate - just trying to nail carves. I thought long and hard about 122 or 111. I waned a 2 board solution for all winds - got a 94 JP FSW nice and cheap.
I think I made the right choice with the 122 - it's very forgiving - I've even managed to recover from almost certain catapults. I mostly use a 7m with it - works pretty well. Would like to add an 8m later. If the wind really comes in I jump on the smaller board. I also got a secondhand 44cm straight fin which makes it quite a bit easier to get planing in lighter conditions. When it's super light I can still go out and practice my gybes and tacks and that extra bit of width and volume helps.
Either way you go you're bound to have fun!