whoever makes those "Summer day's dream" anime man,
they get it.i don't know why exactly but their style is i think litteraly the perfect one for a Touhou anime. they make the character look adult/mature enough to be cool and be able to be taken seriously, yet at the same time have that sort of indescribable, endearing childish/cute qualty to them that Zun art (and Touhou in general) gives.
exemple:


as mentionned by OP, unlike in Fantasy Kaleidoscope, the characters in this one are also quite capable of having pretty comical and over the top expressions sometimes; but not
ridiculously over the top either, just the right amount ;p
Reimu's WTF-Face always cracks me up for exemple, i think it's priceless, even she has one apparently :3
http://i49.photobucket.com/albums/f262/peperonibear93/snapshot20090103141423.jpgplus i love the environnements (the feeling of great openess they give and their choice of colors.. they remind me of Studio-Ghibili for some reason) and their animations is
AWESOMEi mean come on, look at Youmu VS Reisen at 1min 38 of the opening credits...
BADASS!!
https://www.youtube.com/watch?v=wTOoCtK1Rnsi may be a minority here, but i greatly dislike Fantasy Kaleidoscope in general... i don't like the art style (never was a fan of GI-NORMOUS round boobs in anime to begin with... and in touhou universe it's especially jarring :S )
and the other characters that don't have ridiculous (or even impossible: look at their Yuugi! :O ) bodies, like reimu for exemple, she's pretty OK, they still look too old and too serious, i don't know all their characters seem to look emotionless to me...
and i hate their choice of voices except for Reimu (i don't hate those voice actors nessesarily don't bash me, i just don't think they fit the characters well, especially Marisa, urgh...)
that being said, i do like
a lot the looks of the upcoming Hifuu club as well, and i agree with Quwanti Moe Harukawa style can be a good fit
but i still think Summer Day's Dream is the best. it's so under the radar too! check it out if you have the time, it's my favourite!