I'm working on ordering thread for my little sew and knit shop, and am wondering if I should order polyester, or cotton covered poly? I personally use just cotton poly since I sew basic clothing. My question though is if someone wants to purchase thread for quilting, for machine embroidery, etc is there a thread that will cover my bases? Can you tell that I don't quilt or embroider? I'm a little confused since my distributors have things like "quilting thread" what's the difference? How can I make everyone happy? Thanks so much for your input!