I know how you feel Cuttlefish! I surf a pretty crowded metro line up with a lot of log riders. I have a 5 8 SP RF that suited me perfectly (I weigh 100kgs) but I got a logger drop in on me and chopped it up. I was so devo the logger said he would pay for it but I did t bother (I think he was actually scared of me). Shit happens and I paddled her in. Gave her to a local shaper to repair which somehow managed to take 2 months to fix. Anyway, I got me a 5 10 SP FST as I thought it would give me more paddling power and higher wave count. But I find you get to a point that it's either to boaty or doesn't paddle at all. It just didn't work as good as my 5 8, so it goes to show that fine line between having to much volume and not having enough. Personally the 5 8 for someone 100kgs like me is perfect. But I have just ordered a 6 2 Pnator so will hopefully send pics of her when she gets here. I'm gonna run her on Future AM2 first and hopefully she goes just as good as my SP RF.
Also has anyone ridden a 6 6 addvance? Do they track at all with the fuller nose?