I would like a really cool and well-made armor or generic clothing.

http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7475 comes to mind.
Most of the DB Armor replacers are good for this too. I use http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=4070

http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=8469
http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=5584

http://www.mwmythicmods.com/thiefassassin.htm

You have to be a member of the Morag Tong to get it, but http://www.elricm.com/nuke/html/modules.php?op=modload&name=Downloads&file=index&req=viewdownloaddetails&lid=3600 armor is really nice.
http://i57.photobucket.com/albums/g235/Wesadam/Extra%20Mods/WAR_Shadowfox_Male1.jpg

Speaking of Morag Tong, http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=5591.

http://www.elricm.com/nuke/html/modules.php?op=modload&name=Downloads&file=index&req=viewdownloaddetails&lid=3749
Scroll down to find both http://kalikut.silgrad.com/mods1.html.

you don't need to be a morag tong member to buy the shadowfox armor. tried it out just a few days ago.

but you may enter the shrine of mephala after doing her quest but the servants won't sell you anything as long as you are not a member.

http://www.gamesas.com/index.php?/topic/1101038-relz-sotonhorian-armor-morrowind-edition/ looks nice. It won't leave you looking like a LEGO ninja, or http://www.millionaireplayboy.com/mpb/wp-content/gallery/gijoe_cels/cobracommander.jpg