For as good as enma is, ghost hunt is more complex and complete, and might require more "nerve to watch"; Speed grapher is full of weirdness, like a character that makes things blow with his camera, underground cults, weird monsters, etc, most of the story is about the main character that messed with that underground cult, even going as far as running with their princess, them going after him and he beating every single of them, nothing new but certainly diferent...
More about ghost hunt, also from ANN, the second part review
"
The first season of Ghost Hunt mostly painted itself as a supernatural mystery series, one which occasionally displayed a creepy intensity laced with hints of danger and menace but rarely edged down a truly dark path. A sprinkling of humor kept the stories from ever getting too heavy as they profiled Mai's exposure to the realms of psychics and the supernatural.
That changes in the second season, however. Oh, sure, the bits of humor still linger, and the series tosses in some vague romantic rivalries to try to spice up the character interactions a bit, but this trio of four-episode story arcs use an exploration of more macabre themes to ramp up both the threat level and the intensity, resulting in a second half which carries more decided horror overtones. This is especially evident in “The Bloodstained Labyrinth,” the second case on this volume, which at its peaks – the dream sequence at the end of the second episode and the climax near the end of the fourth – is as nerve-wrackingly intense as the best anime horror scenes. Partly due to that, “Labyrinth” is arguably the best of the series' eight cases. "
Be sure not to miss it, although u said you didnt really care for that stuff, these are some of the best the genre has to offer...
And while on the subject, today i came across a review from something i watched some time ago, Rin: ~Daughters of Mnemosyne~
Some bits from it:
"RIN ~Daughters of Mnemosyne~ is yet another in a long line of “adult” anime series where the word “adult” doesn't necessarily mean “mature”, rather simply that the series is completely inappropriate for kids. However, as hilariously extreme as Mnemosyne gets, it still somehow manages to avoid that creeping juvenile feeling that infected previous attempts at this genre (Speed Grapher, that means you). It is by no means a series to be taken seriously and should probably be watched one episode at a time rather than shotgunning the box set in a single sitting (one can only take so much of this at a time), but if you're looking for fun, weird, entertaining sleaze without a hint of irony or cutesiness, this is it.
Just keep the volume down so your neighbors can't hear all the moaning and stabbing."