 If you liked
Tsubasa Chronicle
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 ...then you might like
Fate/Zero
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Both have an interesting concept of magic, used in pursuit of obtaining something that holds immeasurable power/potential. In Tsubasa Chronicle the items are Sakura's feathers, and in Fate/Zero the item is the Holy Grail. Honour and insanity among the different characters are constantly coming into conflict to bring forth an engaging plot line.
I also found that both their OSTs have similar feels/styles. If you like OSTs from one of these animes you'll certainly enjoy the OSTs from the other.