http://tesnexus.com/downloads/file.php?id=8043 and http://tesnexus.com/downloads/file.php?id=8357 by Dimitri Mazieres are pretty good looking.
i like the ranger armors but i wish there was a set that was straight black
http://planetelderscrolls.gamespy.com/View.php?view=OblivionMods.Detail&id=5255
This is possibly the last place hosting Alexscorpion's mod. This armor has amazing detail, is definitely ninja themed, and has some awesome stats. Of course, getting this armor won't be easy, as you must travel through an Ayleid ruin to pick it up. Hope this fits your taste.

lol i actually saw this mod a long time ago when i first got into moding but couldnt download it because i had dial up at the time... i thaught it was gone forever but it looks like its still out there :celebration: .... why did alex pull his mods from tesnexus anyways?