If you're gonna go with light armor, then you're going to have to do something else to supplement it defense-wise. Giving up the Big Three non-magical defenses - smithing, heavy armor, and block - doesn't sound like a winning combination to me. You either need at least one of them (I'm using all three) or else some magical defenses.
I'm okay with my build, I don't really need help on that. This post was more about the aesthetic look of my character. I never said I was giving up smithing, I will lightly use it only taking the steel and arcane smithing perks, to not become to overpowered. The use of alteration and restoration also gives me defensive properties, also at high levels alteration offers the strongest crowd control spell IMO, paralyse.
I also will have a large damage output, dagger in the left hand, mace/sword in the right. Therefore I won't need to take as many hits as other characters.
i like studded imperial leather. Looks sixy on a female elf. Glass looked not bad either. But i still like heavy armor looks more. As for mobility in heavy armor,
bobjim123 watch http://www.youtube.com/watch?v=6aqRkxTjV1c

Haha, that is choreographed, completely different in a 'battle to the death' situation, entertaining though

Ahh didn't think you cared for the rating, in all honesty though unless you have the perk? to get the bonus, the extra from the helmet isn't all that much greater, i can get away with it though because im a ranger and very rarely the enemy/enemy's get in range to deal melee, and if they do it only takes a duel attack with my daggers to finish them off.
You need all 4 pieces of armor for a few of the perks, for light and heavy. Also you get a hidden +25 armor rating for each armor piece you wear, combined with the armor rating from the helm it makes quite a difference. I do want my character to look decent though, and wear realistic armor for the way I intend to play.
The game realistically handles the difference between Light and Heavy armor in terms of sprinting and moving over long distances - You don't need to arbitrarily limit yourself when the game puts the limitation on for yourself.
'Realistically', the sheer amount of distance you are able to sprint in heavy armor isn't remotely realistic. You can take a perk to make heavy armor weightless, having the same effect on stamina and speed than if you were naked. Not remotely realistic, but we are talking magic so some realism arguments can be moot ha.