I only own one pair of straights and they came in a how to knit kit. I use circs exclusively. As for DPNs, I don't own a single set. For icord I just use my Denise's without the cord. For small diameter knitting I use the MagicLoop method.
Hey Rebecca, I just placed my order for the KnitPicks interchangeables. I can't wait to get them. I hope I like them better than my crappy Boye set.