look up Imbad in MyTwinks, i use him for flag running but it works for CCing as well.
i would suspect compared to my mage you might want a little more stamina and a little less int because i cast mana shield a lot, while i would imagine a CC mage would cast many more other spells. remember that spell power really isn't much of a desire for a CC mage; you're going to want to cast frost nova, poly, cone of cold, rank 1 frostbolt, counterspell, mana shield/fireward/frostward, and not spells that do damage. you should try to keep one target polymorphed at almost all times
i think because of that you should switch your belt to 9/9 of the eagle (or at least get both 9/9 and deathmage's sash) and switch the golden ring of power for deadman's hand. also, i would get the WSG staff instead of staff of jordan. also, get the 8/7/7 neck for an extra stat if you want. shoulders could be 9/9 of the eagle, i mean hit is important but with 15 hit to gloves i have little trouble having spells miss (or at least rarely notice it). if you really want to go full-on CC get 12/12 pants of the eagle. since you have +150 hp to chest, the enchant on your bracers is suspicious. personally i think you should get +12 stamina to bracers.
all of these gear suggestions are based on the fact that you don't want spell power, but rather pure CC.
if you want to have some spellpower too (which i think you do according to your template), i would instead suggest the underworld band/deadman's hand for rings, then add 8/7/7 neck and get 12 stam to bracer, then use the rest of your
template and you've got a solid CC set with a decent amount of SP.
if you're going to go arcane and get the mana regen stat, i would get death's head vestment for the chest.
my spec would be
This. POM is great for quick polymorphs or frostbolts. the arcane tree also holds lots of spell resist and survivability. 1 point in imp CS allows for a CS+poly against paladins/shamans/druids/mages/non-felhunter locks/priests. note that i left 6 points out because you can pretty much go in many different paths after that base. you could get 1 more in imp mana shield, get imp blink, or go more into frost and get imp FB or better CDs on frost spells. depends what you like.
frost is pretty good for more of a spelldamage oriented CC mage IMO. don't forget that you can get 2 points into imp fireblast if you choose to go that route.
one last thing you need to realize is that in 3.1 they may change enchants to the 39 bracket. so personally i wouldn't spend on the enchants until 3.1 rolls around and you know which enchants are best then.