If you can afford it I would take 1/2 yards over FQ. There are many cutting instructions for 2 1/2 yard strips or WOW. If you like it for border fabric I would get 1 1/4 yard. If you want it for backing 4 yard for a lap and 6 yard for a twin.
I have mostly FQ and now I am strugling for backing, sashing and border fabrics. Also many patterns I am not able to do the quick cutting methods as I do not have WOW. I think 1/4 yard cuts are no good as you loose a lot of fabric along the edges as it is not straight.
Also most people that are into FQ are big scrappy quilters. Are you? I am but I still need border and backing fabric. I only buy FQ if they are marked down or a good deal.