Whoa, okay, you're talking about hardcore classical stuff. I came in here thinking I could recommend popular stuff to you. (6arab.com and mazika.com are great sources for music new and old, and most arabic music makes at least some use of the arabic modes... i'm not sure how great it is as
learning material though.
This site, though, will probably tell you all you ever needed to know (and then some) about the Arabic maqamaat:
http://www.maqamworld.com/