for the people adding the importance of keeping the chain sharp, dont forget the raker height, you can have the sharpest chain in the world and if the rakers arnt set its just gonna bounce over the top of the timber.
something like the pferd cs-x is excellent for keeping your chains in top nick, but then again the cs-x retails in aus for not much less than the price the op posted of the saw he was looking at about beginning this thread!