So, the only hours that are chanted are Prime, Sext, & Compline?
To be a little more correct:
In the SSPX, Prime & Sext are not chanted, they are recited recto tono. Compline is the only office they sing in full chant. On Sundays and major feasts, Lauds are usually recited instead of Prime, and Vespers are sung in full chant.
I'm not sure if the Benedictines in Silver City, NM, who do pray the entire Office publicly, even CHANT the entire Office. I suspect most Offices are recited recto tono because of 1.) lack of the musical texts which I mentioned earlier or 2.) time constraints.