Tips for Buenos Aires? →[More:]
I'm a lucky duck and going to Buenos Aires next week for a family friend's wedding.
I've been once before but that was 18 years ago (omg I can't believe that).

Fiance and I have the first two nights hotels booked but we were going to see if we liked them or if we wanted to switch after that.

Our current plan is to fly in to BA, spend the first night there, hop the ferry to Colonia and spend the second night there, then we have 2 more nights before the wedding stuff begins.

Anyone have recommendations for
-what to do
-where to go
-what to see
-where to stay (under $150ish/night)
-where to eat (especially places that might have vegetarian things for me)
-where to shop for cool local things

My Spanish is pretty bad and my fiance's is worse, but my sister who will be traveling with us most days is fluent.
She's staying with another friend so I only need a hotel for me and fiance.