Sort them out into which you use the most, Tau (as they are getting their update) should be first (unless you don't like them much).
As for the SM and chaos, it should come down to which you like more, I myself have three armies, but none of which are tau so I can afford to wait for when I have the cash.
It should always come down to which army you like the most.
As for the SM and chaos, it should come down to which you like more, I myself have three armies, but none of which are tau so I can afford to wait for when I have the cash.
It should always come down to which army you like the most.