Batting is very personal. I first went with the absolute cheapest when I started for obvious reasons and it would just fall apart when I washed the quilt, I'd end up with big balls of batting here and there. Then I tried W&N, mostly cause it was one that JAF carried at the time and it was lovely to work with but super hot for my climate so I tried a few more things (other cotton battings, cotton and poly blends, I did try one silk and it was lovely but very expensive) and somehow I landed on Soft & Bright which is a low loft 100% poly made by the Warm Company. It quilts beautifully and it works well with my climate and it dries really quickly in the dryer and it works for my budget. I have no idea how many rolls I've gone thru over the years LOL, I get them on either Walmart or Amazon.
If you can afford it, you could get a crib or twin sized of various brands and try them on projects and see which one you like best!