You Can Never Have Too Much
I am of the firm belief that you can never have too much cardstock - especially black and white. I love white cardstock. It's so versitile! You can use it as a more solid backer for lighter paper, as a background itself, mats, frames, whatever you want. You can ink, paint, glittler it, etc. to make it whatever colour you want. Again - an extremely versitile product. I especially like the Bazzill cardstock because it is firm and solid and will hold up really well no matter what you do to it. This is definately something to invest in.