I'm 12st and have the k-tech linear 0.85 springs, just about right for me, I'd reckon they'd be fine for you too. Way better match than the OE springs anyway.
I use Silkolene PRO RSF fork oil, one of the better spec oils IMO (very high viscosity index VI, which means it doesn't change as much with temperature). Personally I find the PRO RSF 7.5W suits me in the SV, but be aware that the nominal viscosity of that is more like a typical 10W oil (around 35cSt@40C). Check out the viscosity table in the bible
here .