You already have a lot of good recommendations but I'm going to give you some..
Shounen Onmyouji:
http://www.anime-planet.com/anime/shounen-onmyouji
Kekkaishi:
http://www.anime-planet.com/anime/kekkaishi
Here are some others you might want to check out..
Rental Magica:
http://www.anime-planet.com/anime/rental-magica
Kaze no Stigma:
http://www.anime-planet.com/anime/kaze-no-stigma