CP The City was one of my favourites as well and I am sad to see this property go. They have always treated me well and I liked the price/quality ratio.
I also liked the Indigo's, even though they are not cheap and as others already wrote, some rooms are very small, especially on points if you don't get an upgrade. For tourism, if you don't mind small rooms and a noisy neighbourhood, I liked the Indigo Leicester Square, they also have a nice rooftop bar.