Once you exit arrivals into the main hall take your trolley up to departures in the lift and then if you look at the picture I took a couple of weeks ago

http://i119.photobucket.com/albums/o...rts/ezeiza.jpg

go to the far end of the terminal. If you zoom into the pic you can just make out some people sitting down in that area which is very quiet.It really is the quietest part of the terminal.you'll be alright there reading a book.There is a cafe and a couple of shops at the end I took the pic from if you want.Not sure about toilets on that level but the toilets downstairs are immaculately kept and room for trolley access.

I love Ezeiza,it's great for people watching.