Definitely the le meridian with its central location. It's quick to pop back to the hotel for the toddler's afternoon nap. Spend a little bit more points for a junior suite (think you have to call to find this availability). I can't remember how much they charged, maybe only 3000points more than a regular room. Definitely worth it. Not sure if we got a further upgrade or not, We ended up with a suite with a door separating the bedroom and living room. It was on the 7?th floor overlooking the beautiful city. It was so great waiting for the little one to nap while sipping a glass of wine on the balcony overlooking the city. The only thing about this location is that it's not near a park. But there is some green space at the Plaça de Catalunya a couple of blocks away for kids to run around.
Saw the W and it was way too far from the attractions.