I am interested in getting some dp needle sets for sock knitting. In the Knit Picks catalogue there is a set of Nickel-Plated Needles, 6 sizes, 5 needles per size. There is also a set of 'Harmony' wood needles which are laminated birch 6 sizes, six needles per size. There is only a $5 difference in price. I am wondering if those of you who have more experience than I would recommend one over the other. What are the advantages/disadvantages of each type? I would appreciate hearing your opinions. Thanks.