The weight for coloring doesn't matter to me either if I'm layering. I do like a sturdy card base regardless.
Janeen, I've enjoyed looking at Susan's blog this morning. It's been a while. It looks like she's mostly using PTI white. Guess I'll hold out until their new release and maybe a few days after in case MFT or someone has a St Patrick's Day sale.
Beauty is the miracle of things going together imperfectly. ~ Anne Lamott