Ok Iv'e bitten the bullet and picked up a Symmar-S 5.6/135mm for $156Au, its in really good condition and coming from an Australian seller, this saves me the $30-40 postage that would put any lens from Japan or the US into the $300 mark.
I guess the consensus is nearly any coated 135mm lens will perform similar to its counterparts and in the end its up to the photographer to take good shot.
Everybody's advice has been fantastic. Any tips from users of this lens that I should know?
Through my research it appears that after f22 diffraction is the killer of sharpness not optics. I usually shoot f22 and occasionally f32 so i think I'm on the right track.