I don't mean to nitpick, Tom, but is this really your plan?

You have probably already read these, but what the hey. So far, there are 33 stories at xf_book_club listed under the casefile tag. Of those, my personal favorites, in no particular order, are as follows. I am quoting my entries because I am too lazy to think up new stuff to say.

Oyster by Jordan. This is so good we discussed it twice. Like all great western religious stories, "Oyster" takes place in the desert, in the modern day stand-in for Sodom and Gomorrah, Los Vegas, a land of waking dreams, endless heat and unquenchable thirsts. In her author's notes, Jordan states emphatically that "THIS FIC IS REQUIEM FREE." This is rather misleading; in actuality, "Oyster" is a re-envisioning of the end of season seven, and to a limited extent, season eight. The parallels are multiple and striking. In both stories, there are deaths and multiple abductions. There is an investigation in which Skinner, Scully and, of course, Mulder are all major players. To say any more would spoil the story for new readers. While "Requiem" inspired a lot of fanfic, "Oyster" is one the best stories ever written for The X-Files fandom. I recommend it without reservation.

"This House is Burning" by Tesla is flat-out the best Profiler!Mulder series I've ever read. Tesla's writing style flows effortlessly, and is, by turns, unobtrusive and lyrical. Her Mulder is both much more competent at his job and much less crazy than he's often written. Frankly, that's a pleasant change. But the trilogy is more than a series of meticulously constructed police procedurals, it's also a believable, emotionally involving, Mulder/Scully romance. So let's see: great writing? Check. Exciting plot? Check. Scorching hot sex scenes? Check, check, check.
Part One: Blood on the Snow.
Part Two: A Thief's Diet
Part Three: The Quiet Glades of Eden.
The print is tiny, so I had to magnify it by 150%. Her stories are also at Gossamer.

Malus Genius by Maybe Amanda and Plausible Deniability is a very funny, very cleverly plotted casefile, which is also an X-File, written by two of this fandom's best. The link is to reocities but this is at Gossamer, too.

Bone of Contention by Kel and Michelle Kieffer is a story I reread any time I am feeling low. I think everyone who loves to read has stories or books or fan fiction that they turn to in times of crisis, for escape or to just to make them smile. This one does all of that, and more. Any story that can make me laugh and cry and creates genuine suspense about the case file and the romance is a classic, in my view. I remember how disappointed I was when emily_shore recced this fic at crack_van. "No," I wailed. "That's my favorite story! I want to get to rec it." So now I have, yet again. You can read this and many other fine stories by these authors at, yes, Gossamer.

I have many more but my sciatica is acting up, so that's all for now.