I am a good fabric convert. At first I used what I could afford no matter what the quilt was destined for.
Then I tried to make a complicated star/flying geese pattern that used 1 1/2" half square triangles. Whew!
The cheap fabric stretched and slipped and was generally a Pain in the a**. When ripping out seams, I most often ripped the fabric.
The good fabric stayed put, sewed beautifully, and those are the seams that have stood up. I've had to repair some seams, and yes, they're the ones with cheap fabric.
$$ isn't always the point. You can tell how a fabric is going to behave if you handle it in the store, pull it along the bias - if it moves more than a tiny bit - pass on it.