QUOTE(zasal911 @ Dec 17 2008, 01:02 PM)

That's some awesome advice guys. Thanks a lot. As for wine tasting in Mendoza, I have to try that, though I'd probably rather do it in Chile if its affordable given that Chilean wine is generally of a better quality.
How much do you guys think this could cost if we do bus it (we have the time and want to save money) and stay at hostels??
It's all about the Malbecs in Argentina, which we don't have in Chile, though we do have Carmenere which gets some people all excited. Mendoza is really well known for a couple of Malbecs that are real prizewinners. There are winetasting tours from Santiago, though they tend to take you to some massmarket (Concha y Toro), or other places you could probably get to by bus (Cousiño Macul). Outside of the city you'll do better. The problem with these tours is that they tend to be small and on-demand, and if you don't meet up with a couple of other people to split the price, they're very expensive. There is the tren del vino though you might like to check out if you have time. It's about $100 US at current exchange rates, goes through the Colchagua Valley see
http://trendelvinochile.cl/2/.
The trip price is pretty variable, and depends alot on the quality of bus you want. For example, the same bus ride by bus in Chile from Santiago to SPdA will cost between 33,500 for semicama to 50,000 for the most exclusive service. Actually you can do it much cheaper by going "executivo" or regular pullman bus, but this service usually just goes to Calama, because most tourists (who is who goes to SPdA) want the fancy bus. See
www.turbus.cl for an idea, though this is not the only bus service, as detailed by mmbcross (saying hi!).
I hesitate to give you a budget because it is all so variable, especially depending on whether you sleep on the overnight busses or prefer hostels and/or like to drink a bit with dinner.
Maybe someone else can give you a ballpark though. Anyone?