I’ve done D5 for 2 years in first grade. Listen to Reading is probably the one I spend the least amount of time planning for. First, you are right. It’s hard to find books read online that show both the words and pictures. I suggest you search youtube. Many thousands of books exist that do a good job of both text and pictures. Since you already know how to create QR codes, I suggest finding the videos on youtube, running them through a program like safeshare.tv to eliminate the ads and creating a file or ring of QR codes. I’m not sure if you know about Teachers Pay Teachers, but there are lots of QR code books for free or small fees on TpT.
Second, I pick my books strictly on enjoyment or theme- fall books for fall, bat books when we’re reading about bats, characters they love, etc. I never assign books to listen to. It is free choice between what I have out. At the beginning of the year, I use the class computers for listen to reading. Later when we need the computers for other things, we have the old fashioned Cd and book. I’ll leave 5-6 out for them to choose. I only have 2 iPads and we use them for different things. There’s a splitter I picked up from Amazon if you want more than one student to listen to one iPad. It’s called the Belkin Rockstar Multi Headphone Splitter. It works well with earbuds. I think by the middle of the year, you’ll find that most kids move away from the listen to reading as a choice (my must do is only read to self) unless you have 5 rotations every day.

A site for Listening to Reading that we use is Tumblebooks. It shows the actual illustrations and words, and reads the books to the listeners.
You can get a 30 day free trial to see how you like it. If you have other teachers who are interested, you all can take turns getting the 30 free trial and share passwords (I know, we’ll all be in teacher jail together) :). If your school decides they like it, the K-3 site license is like $600. I know it’s a good chunk of change, but you can write grants, like through Donors Choose (easy and very supportive of teachers).
I agree with Susan that books for Listening to Reading should be books of choice, and it’s fun to have book suggestions related to what you’re studying.

Hi there:
As a former actor, listening to reading is a passion of mine. My opinion and much of what I have read says that listen to reading is especially good for high interest books not at a readers level. It offers 3 things in addition to the story:

1. Access to new vocabulary 2. tracking practice. 3. hearing what good/interesting reading (aka fluency) sounds like.
   If you have English language learners it is an additional boost to their language acquisition.
   As for adding your own remarks…that could be fun, but remember, you want your reading to come in at the child’s/class’ stamina level. You might want to note those books with a sticker so students know they may take longer than 1 session, and have a procedure in place . If you do mini lessons in between your sessions, you would have to interrupt the story to have them join you. Children are usually quite immersed mid-story and it can be hard to get their attention and for them to come out of their book world into a learning space.
   Have fun with this!