I am using Replica since early days for my AI-driven movies. I was looking for rich library on diverse voices - and here I found not only wide range of voices, but also the quality is superb. Many Replica Studio voices have a theatrical quality. In my experience, the best text2voice service for creative needs.
Here - as an example - my AI-driven performance of ee cummings' poem:
https://vimeo.com/544342988