How the heck can we know what looks cool to you? You might enjoy running around in a chef's hat and tunic for all we know.
It's a well established strategy now, maxing out Enchanting/taking the master perk and then enchanting head/body/neck/finger slots with -25% to casting cost to your choice of 2 magic schools. Making it essentially free to cast spells from these schools.
How would you know what looks cool to me? You could start by realizing me asking for unenchanted robes and assuming that meant I was looking for unenchanted robes. I also know about that exploit, but why anybody would use that is beyond me.
Radient Raiments has some good stuff. They have College Robes unenchanted which look good, as well as the Mourner's clothes. Personally I just found clothes I liked and enchanted those myself instead of going with legit robes.
Thanks, can't believe I forgot about that place. Haven't even been to Solitude yet with this character. Game's huge.
There is literally no point in enchanting un-enchanted robes... Do it on armour.
I go more for aesthetics than anything. Armor might make more sense to be the most powerful, but robes make more sense for the character I'm playing. I might make daedric once I get all the things needed for the atronach forge though.