Argentina and/or Chile wine trip recommendations?

My wife and I are thinking about a (mostly) wine oriented trip to Argentina and/or Chile late this year. We live near New York City currently.

One option would be to fly to Buenos Aires, spend a few days in the city, and then fly to Mendoza. Alternatively, we fly to Santiago de Chile for a few days, and then jump over the Andes to Mendoza.

So either way, we would love some recommendations for our stay in the Mendoza region: - How long would you recommend staying? - Hotel/accommodation recommendations? - Winery recommendations? (Red wine) - Any (local) guides who could help putting the trip together perhaps? - Etc…

If we end up going the Santiago route, I believe some of the great red wine vineyards are located very closely to Santiago. So in addition to the time in the city, we would also be interested in visiting some of those as well. So if anybody has any thoughts on vineyards/wineries in the broader Santiago region, those would be very welcome also. (Basically similar questions as above I guess…)

Thanks in advance for any tips and input. Feel free to share whatever you feel relevant! Cheers.