Iberia, bless 'em. The only airline that has allowed me to take off with my business class seat in full recline and a glass of sherry in my hand. And some of the haughtiest cabin crew around.
My personal experience was summed up when we landed at Madrid. One of the unsmiling retirement-age cabin crew opened the door to the airsteps and THUMP out came the escape slide. Oh dear, whatever happened to 'cabin crew doors to manual and cross check'?
Food and service is fine, business class seats intercontinental are fine, but for intra-europe travel I'd still recommend BA. Much nicer lounges too.
I though Lan Chile and Lan Peru were pretty good when I flew them. Anyway, the choice is yours so do something different, if only to talk about the day you made your transfer via escape slide.
Enjoy your trip.