I'm working on a personal/business trip this August, and will be going from LAX to EZE. I would like to do it on *A or MP partner airlines. I would be buying a paid BIZ ticket. I'm trying to optimize comfort/hard product and good sleeping time...

My "default" routing would look something like this:

LAX-IAD on UA flight 946 (777).
IAD-EZE on UA (767--reliable new configuration?)
EZE-IAD " " "
IAD-JFK on exPlus flight
JFK-LAX on ps flight.

I've found a "reasonable" D-fare, which I can upgrade using SWU's (although NF=0 at the moment). (Taking 3-class birds transcon gives me a shot at the F cabins. I don't mind the longish lay-over at IAD on the way there, as it gives me a chance to get dinner before the flight, then take an ambien and get some sleep on the way to SA).

I'm assuming the only lounge available in EZE would be the RCC? That club wasn't too bad, back in the day.

I've checked on ITA for availability, and see also TAM and TACA, as well as AC. I even looked into LH (LAX-FRA-EZE). Too much time and $. Anybody care to comment on other options? TIA...