I liked the premium voices from speechify and natural reader, but those were pretty expensive. Regarding the free voices, I tried a bunch of different options there, I don't think I remember which ones. I'm pretty sure that I tried tts on my iphone and mac, but didn't think they were very good. Are there different models/voices that apple offers that need to be downloaded seperately?

Edit: Ohh, there are indeed. Some of the voices have enhanced versions that do sound much better. Not as good as the paid ones, but maybe good enough. I'll give it a try.