Eva & Nick,
It sounds like we'll be in Rio at the exact same time.
I'll be there 19 Dec - 26 Dec, staying at the Arpoador Inn.
It's my 3rd visit to Rio, but my first at this hotel.
Where did you wind up booking?
Btw - I, too, prefer Ipanema to Copa.
If you still have any questions, I'm no expert - but feel free to e-mail me:
jasonroseman at hotmail.com
Enjoy!