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I know that at times it can be difficult to find fluff relating to Dark eldar but i have found a site that has alot of fluff information to do with the dark eldar. When you see the size of information there is you will know that some will be wrong but it is still ane excellent information source
Portalark Eldar - Lexicanum
Yeah, Lexicanum is a great source of reference. Just keep in mind it's a wiki, which means anyone could put anything in there.
The weaponry descriptions are cool, but there aren't a lot of quotes yet.
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Yep which is good in a way cause you get lots of peoples opinions but alos bad because it can be false information
Azzarath The Soul Keeper - Archon of the Soul Stealers
"Fetch me another play thing. This one seems to have broken"
Urien Rakarth, Master Haemonculus