Is there any good ones with either Momiji or Reimu x Yukari?
If you are looking for Yukareimu you can find a fair amount of both Personal Colour's and Iyokan's works on this pairing over at Wings Of Yuri's archive.
http://www.solelo.com/blog/index.php/download/As for general recommendations, anything by Iyokan is good. I have yet to read anything bad by them. People have already mentioned "Though the Wind Cries", and I'd like to agree. It's superb.
My impression of Personal Colour is a bit mixed, but at their best they really are great. "Three by this side, Two by the Other Side" is arguably their best, it's a beautiful drama.
Mizutataki, more known as Water Cushion in the English speaking community, is a circle I'd like to mention. My favorite by them is "Shining Gensokyo".
Another Circle I like is "I Can't Fix the Tactical Helmet, Sir!". I especially enjoyed their two-part Mary and Renko centered doujinshi, "False Bamboo Sprout in the Miso Soup" and "False Nipponia Nippon in the Miso Soup".