I am currently making a quilt with white on white bought at my LQS. It's a moda line, very soft and doesn't show through. {Have used this on a previous quilt and it came out great.} About $8.99 a yard tho.

Kona cotton is pretty inexpensive. I have seen it for 4.99-6.99/yard and that isn't even on sale. I really hate to use cheap thin white fabrics for the very reason that the seams show. I think sometimes quilters have a hard time paying a little more for better quality plain white fabric because it is just that: plain white fabric.

when you find one, shout it from the rooftops!
i'll be waitin'...

Konas fray but they are thicker and dont show seams.

I use broadcloth often and don't have any trouble with see-through problems. Be sure to shrink it first either by machine wash and dry or spray with water and iron. You can see it shrink. Bed sheets are good too. Most good cottons are a little more expensive but do the trick.
With the cotton fields in trouble in Texas and the drought they are having, cotton prices are going to go up some more. So stock up on a good buy when you see one.

Carol J.

Worst case scenario--I've doubled up on a block sometimes. Usually, I just make sure that I can press the seams toward the other coloured fabric.