Likewise, TTS is what I really want. My goal is to be able to create audio books from text. I've been using Amazon Polly and it's acceptable quality, but I would be ecstatic to be able to do it locally on my own hardware.
Check out NaturalReader. It has hundreds of amazing voices, a system for highlighting text as it is being read, works on books (pdf) and webpages, and is available on phones and in browsers on all platforms. So I could have the same voice on Mac, Linux and iPhone.