If you want to stay in Palermo Hollywood, I don't know how you could find a better place than Marcos's place.
The light-- morning, day, night-- was amazing. The view-- outstanding! The responsiveness of the owner-- couldn't be better.
I found myself planning my day around being home at sunset time so I could enjoy it. It's not because you are so high up (11th floor), but there are no other tall buildings to the west so the view is completely unobstructed.
Marcos was great about replying to my requests and suggestions. And was thoughtful enough to leave a bottle of wine waiting for me.
It's a great place.