What are the recomended clothes to use with fortify alchemy?

Choose lightweight equipment so you can carry it round with you.

Go to the clothes shop in Solitude for a full range of dresswear to choose from, including gloves and circlets and hats.

Saving your coins is irrelevant. Most clothing costs less than a single petty soul gem.

edit:

Following on from a good point about naming: you can use a "." full-stop at the start of the name. All symbols are place in the inventory first. I have mine named like:

.Alchemist's Cowl
.Alchemist's Safety Gloves
.Forgemaster's Ovenmitts
.Forgemaster's Heatproof Apron

etc...

I just want to add to the other comments, be sure to name them otherwise things get really confusing. And don't name them hat of alchemy. Name it Alchemy hat, alchemy gloves, alchemy amulet etc so that when you equip them they're all in the same place. I wish I could name potions. Try my potion generator.

Enchantments in Skyrim are the same, no matter what item you put them on (for a given skill level, soul size, and perks known).

This means enchanting a pair of Leather Bracers with "Fortify Smithing" is just as effective as enchanting a pair of Daedric Gauntlets with the same effect.

This is different from Oblivion, where item choice mattered, mostly because many pieces of clothing took up multiple "slots" on the character's body, and if you weren't careful, you could wind up with fewer enchants than if you had worn armor.