Well, the Dark Eldar are probably the hardest army to play effectively between both 40k and WHFB. I say that with some DE experience, having a small army of them and playing them for a while back in 3rd and early 4th edition. If they are posting well at tournaments (which I must say surprises me) it is because there are a select few who know how to get the absolute most out of the book and can play the army really well. I wouldn't say there are too many people though.
Their models are all very old and some GW's don't even sell them anymore. It is a shame because they were a cool army. I'm afraid I have to stick with the not being worth it until they get redone, and I haven't heard anything since that last post 7 months or so ago so who knows when it will happen.
I can definitely agree that Space Marines get waaay too much attention, new models and a new book almost every year. There is a reason for it though. Space Marines account for just over 50% of all GW sales. Yep, not just 40k sales. Not just 40k and WHFB. 40k, WHFB, terrain, books, paints, equipment, all the LOTR models..... 50% of all sales are marines, and GW is a business so it makes sense that they keep pumping the most popular poster boys of the company.
Also;
This is in reference to the recent-ish Blood Angels codex, quite amusing.
