you've got nice temps on that voltage... you usually have to go higher to get faster clocks with conroes, but i think you can with those temps... up the NB voltage too so you can get higher FSB clocks... you'll have to tune the memory too
go for 4.3 for SPi nos... it should be stable enough for that... can probably get to low 9s...
i wanna see what you can do with this thing on water!