We seldom have sales people offering us help. Most of the vision professionals have gained their knowledge from sales people offering only Windows products. I happened to sit in on one of their training sessions last year. Companies mentioned here are just suggestions. Products and prices change constantly.
Prices usually go down and the quality and features usually increase.
The Mac speaks English and Mexican Spanish. The Mac OS has both English text to Speech and Spanish text to Speech Programs. This allows the Mac to speak any text that can be selected with the cursor. It works within simple text and a few other programs. I use a small program named Hearit to listen to the text in every other program.