I do love the look of the spectres but the fact that they are FW (not a big thing in my gaming group yet) and the price of them (in ££ and points) means I won't get any unless they become a codex unit in the next eldar book.
They could also use some rules tweaking (longer range and/or more shots plus maybe a return to AP2 would be nice) before they can stand up to other heavy support units like war walkers, wraithlords, falcons and fire prisms.
If I'm correct, this is a "Shadow Spectre" eldar aspect warrior as first introduced in the ForgeWorld Imperial Armor Volume 11 "the Fall of Mymeara". Their leader is called Irillyth, and this is indeed an excellent illustration for that character. Thank you very much for putting this in the public domain.
i really suggest you look for for 40k stuff that was written in the 80's. it was a lot more open and interesting. Not so formalised and Imperial based. Also leaves a lot more up to interpretation.
There was wonderful piece that your image make me think of ... it was a fish like Eldar vessal ... the caption was this "scourned and ostricised by their own kind, the mercenary Eldar hire out to any creature willing to meet their exhorbitant fees. The sudden appearance of an Eldar mercenary ship above a wwar-zone causes instant panic amongst combatants. Have the been employed by the enemy or are they open to offers? Even if cash has changed hands it is impossible to be sure where their loyalities lay. Only when the glowing legions swoop from the air are questions answered once and for all."