I would like some advise about circular knitting needles, especially the "systems". Which ones do you like/dislike and potential problems with certain types. Or, would I be better off to buy needles only as I need them. My problem is that I live near a small town that has a Wal Mart as the only source of supplies, and those are limited. So, I cannot always find what I need and generally move on to something else. I'd like to quit missing opportunities to try new things. Thanks for any help you can give.