At level 57 these are without doubt the best hunter gloves. This is a BC item that can be used before level 60. You won't be wrong if you buy them at the AH.
I guess this is the set designed for hunters, but also is the best crafted item for enhancement shamans. The other option from LW is the "Scaled Draenic" set which has spell power or the leather items "Wild Dreanish" set and "Thick Draenic" set.
Overall very nice for enha shaman, gives 59 AP and some melee crit. Unfortunately there is no set really itemised for enha shaman at this level, this is the best you will get unless you really need the stam.