I think it should depend on the type of sorceror you will be playing as.
Lets say you will be good in conjuration, and you will be summning monsters for direct battle and materializing 'bound' Daedric weapons and armor for melee attacks and such. You would definately want to use heavy armor.
If you prefer to bunny hop or levitate around your target and launch projectile Damage spells, it may favor you more to wear light armor. I personally like this best because it because [protection + mobility > cost + weight].
Maybe you arent going to be a combat oriented mage and use magic to help out in every day life, ex: Unlock, Levitate, Chameleon, Restoration and the like. Then it wouldn't matter what armor you use and you could very well go around with a high Unarmored skill and be fine.
Hope this helps!
[/rehab exibition]