Hi,

I'm choosing between these properties in Madrid for a stay in mid-December:

2 nights in one of these hotels in the city:
AC Hotel Atocha - 20k
AC Hotel Aitana - 17.5k
AC Hotel Cuzco -17.5k
AC Hotel Avenida de America - 17.5k

1 night at the airport hotel before flying out the next day:
Madrid Marriott Auditorium Hotel & Conference Center - 10k

Any recommendation on where to stay in the city? I would also consider staying all 3 nights at the Marriott given it's much cheaper if it's not too much of a hassle transportation wise.
I'm a Titanium member so elite recognition would be great.

Thanks!