I'd bring as many clothes as I could. As Lucha said, you could probably find stuff but to expound a little on the "but" - quality clothes are expensive here and can even be hard to find. And I've found that sizes here are smaller than in the States for the same size - I wear an XL or sometimes XXL shirt in the States. Here, an XXL fits me like a Large in the States quite often.
Every time I go back to the States I bring as few clothes back with me as I can, and bring as many back to Argentina from the States as I can. Last time I brought one change of clothes in my computer bag to the US and bought two new pieces of luggage up there (something that is inordinately expensive down here), all full of new clothes (and electronics! And spices!) when I arrived here.
If you're coming directly here to live for a year or more, I'd think seriously about paying to bring some extra luggage down with you.