While it is a poor worker that blames his tools (for poor performance)--Good workers deserve good tools.
good quality knitting tools make it easier to do good quality work.
Go for broke--as for the whole set of Knit Pick's Harmony interchagable needles, --and the extra small sized that are not included..
ask for double of the small size, (med length)and for a few extra long (40 inch ones)
then you can knit your socks 2 on 2 (mediums) (sizes 0 or 1, or 2 or 3)
or 1 (or 2) magic loop--(again from size 0 to size 3)
Women (as a general rule) don't invest in the best.. but its worth it!
sock yarn comes in a range of prices.. as little as $3 a skein (2 skiens need) to $15 a skein (2 skeins needed!)
the more expensive yarn is prettier..(a bit softer, but mostly just prettier.
some cheap sock yarn (lion brand (about $10 for enough for a pair) is splittee.. but then so is some expensive yarn!
Patons krow is a bit splitty.. (about $5/2 skeins required)
Coats & Clarks new Heart & Sole is about the same price (a bit less splitty)
Koigu is less splitty (and has beautiful colors-not that LB, paton and C &C don't but hand painted yarn is far and way prettier..and about 3 times the price!)
Workmanship counts almost as much as materials.. ( i make beautiful socks with LB, Paton and C&C yarns!)