As a collie owner for way too many years! I do love to hear the description of collies from generally non collie owners 
All my collies I have had 8 have needed a lot of attention. Not necessarily loads of physical activities but a lot of brain work. They are always ready to be doing things and will herd and encourage you to do things consistently.
However they also have a fab off switch if their needs are meet. They are not all roaming the moors for hours on end every day of the week.
They are very very sensitive so do need a calm consistent household and one that can give them a lot and I mean a lot of time. So thinking of a winter day when the DC are at school and then it is dark when they come home would be challenging for a collie.
I also have labs and wcs. Tbh the lab at the moment is the hardest work! Full on nutty, mad crazy enthusiastic labrador. I am sure he will be fine when he is 7 but right now give me 20 collies for one 2 year old lab!
However collies are not for the faint hearted and if you get a collie now you could easily have 16 years of full on collie. It really is a lifestyle choice and not a dog that will fit easily into an existing non dog household. Your household will have to change to have a happy contented collie. It will be a massive change.
Day to day with my collies they are walked minium of 2.5 hours off lead. These are not gently quiet relaxing walks looking at the scenery. These are collie walks, ball hiding, running around trees, through my legs, paws up, heel work sections, tricks training, searching, scenting etc. They will then come home and chill but are up and ready to work with us again in the afternoon. Some do agility (but for some this is too arousing) some do scent work and mantrailing in the evenings.
No idea of your family dynanmics but collies can find loud houses and emotional outbursts very very hard to live with, they are generally very sensitive dogs - partly why they are never used to be assitance dogs they would need their own therapy dog to help them!
Re OP original question getting a resuce dog you have some idea of what you are getting. You can see before you buy and maybe even foster before committing.
Getting a puppy is never the clean slate that some people suggest a lot of very important development has taken place in the first 8 weeks and this may not become apparent until a later date.
There would be more compliant dogs for your DD than a collie Ones that would be up for training and activities but also happy for a cuddle on the sofa. Some of the crosses from rescue would be good, poodles would be fab.