Hi,
Yes, we have the 65" IIyama screen and can definitely recommend them. We have been looking at interactive screens for a little while but found a lot of them to be over priced with too many features that my schools did not require but just part of a hard sell tactic.
The TV's come with built in speakers which are more than adequate but some people still prefer adding speakers/sound bar. I have a deal with a local supplier who provide speakers as part of the price.