Once you've reached stage 6 (orange) on ORT, and if school is decent at teaching phonics, your DD should be able to attempt pretty much any book - from a decoding perspective.
So the question is more about reading stamina, likes, interests, and age-appropriate topics/vocabulary. Which of course depends very much on your child!
DS when on stage 6 at school, had good stamina and would read for hours, but only if the books had pictures (colour pictures on every page, that is!), were on a topic that he was obsessed with interested him, and had quite a large typeface. Also each individual book couldn't be too long or he would not attempt it, whereas he'd easily read the same amount if it was split up into three shorter books. He didn't 'do' chapter books (unless the chapters and the whole book were so short that he could still get through the whole book within 30 minutes - in which case he was then happy to go on and read the next book in the series...).
Specifically, he'd read and enjoy books on his obsession (think Lego Starwars readers). Blue Banana books from the library. Usborne 'Look Inside' and 'See Inside' books (non-fiction, with flaps) on topics of interest. Occasionally he'd read some of his 'old' picture books (e.g. Julia Donaldson/Axel Scheffler). He enjoyed some of the 'Early Reader' series of books (but not the Horrid Henry ones): The Lion on the Meadow. The Man Whose Mother was a Pirate. The Haunted House on Buffin Street (and sequels). Mondays at Monster School.
We also had books from the 'practice your phonics with traditional tales' series (Usborne). DS never picked them up by himself, they reminded him of school books; however he DID enjoy them when I bribed him into reading them. Big colourful pictures, interesting stories (think Beauty and the Beast, Mulan, etc).
But depending on your DD, she might be fine with books without so many pictures; she may be happy to work through longer books, a chapter per sitting; and obviously her interests may be entirely different.
I'd suggest taking your DD to a library and letting her browse the books and pick a few! Or ask the librarian if they have any children's books on, or featuring, whatever your DD is interested in.
At that stage (and still now), for reading at home, I am of the school of thought that whatever your child WANTS to read, is a good book. So I wasn't bothered about literary quality, or if the book stretches the child; anything that he enjoyed, I was happy with.