Visually appealing/Mind-messing anime?

I feel like being inspired to make a short film. Any suggestions for a very visually wow anime? Something that would make someone totally film-unaware appreciate brilliant editing and scene composition? Maybe something very thought-provoking or makes you question your value as a human being as you sit there watching through the most genius piece of art you've witnessed in your life.

I'm pretty open to any genre though I prefer nothing purely ecchi-focused (I've already gotten over a year's dose with Highschool of the Dead :eyespin:). Something short would be preferred as well (less than 20 episodes would be best)

Examples:
Bakemonogatari has the type of visuals I'm talking about, if there's anything nicer than that, great :D Suggest it!
EF - A Tale of Memories was nice as well.
I also enjoyed watching the Amazing Nuts! shorts as well. A brilliant plot would be a major plus though.
Higurashi had a nice vibe going on, but... I got bored :heh: Same thing with Boogiepop Phantom
I got through about half of Mushishi but for some reason the plot just didn't stick...
KARAS was very visually nice for me too and something like that won't be bad though I want to watch something more abstract and more nicely edited than generated... If you get what I'm saying...

Thanks guys :D

tl;dr: Stuff like Bakemonogatari.