Thief Gear?

[Coot]

The cuirass you mentioned is one of the better light armor parts in the game, keep it. As for enchanting: you can enchant every item that's not been enchanted yet. So in your case that means the Dark Brotherhood items you're wearing.
Also, you can, of course, carry as many items in your inventory as your strength level allows. That means you don't have to limit yourself to, say, one pair of boots or one helmet. For instance, there are many rings in the game that makes a thief's life easier. So why use only the menor's ring and a ring of night-eye?

[Avoca]

I haven't found any good ring yet. Have any suggestion's?

[Coot]

Ring of telekinese has proven quite handy, to me anyway.
Ring of Khajit: 30 sec. of invisibility and 10-20 pts speed improvement.
The ring of surroundings: chameleon 10-30%.
Marara's Ring: constant effect: reflect 20%, fortify acrobatics 10 pts and resist normal weapons 30 or 40%.
Ring of the wind: fortify agility by 30 pts, constant effect.
Very useful (but also very cheesy and, uh, not a ring) is the amulet of shadows, which gives you 80% chameleon for 120 seconds.

I'm sure others can think of other rings and amulets and other neat stuff.

[Avoca]

I have now gotten the ring of kahjit and the amulet of shadows and i forgotten to mention earlier that i got belt of heartfire.

[Avoca]

what should i enchant my dark brotherhood stuff with?

[fable]

Avoca, if you have multiple questions, please start new threads. That way, if someone has an answer to one of your later questions, they won't hang back looking in a thread because they didn't have a comment based on the thread title.