Greetings Bro,
I watched this series time ago. I like the soundtrack, it's quite good. The storyline isn't the best (there have been a lot of criticisms because of the way the episodes don't meld properly, they don't have a flowing coherent storyline) but the fight scenes are good so it's one of the better series that have been made.
You should try 'Darker Than Black' or 'Bleach' if you like action based anime.
If you want to see some of the more philosophical stuff, the more spiritual/historical based stuff then try 'Seirei no Moribito' or 'Ergo Proxy'. For some weird but very entertaining stuff, try 'Denno Coil' or 'Paranoia Agent'. You can put all of those names into wikipedia to get storylines.
If you have bit torrent software you can get most of the recent stuff here:
Baka-Updates
The recent free version of limewire supports bit torrents so you can use that if you don't have another bit torrent client.
You can also download a lot of stuff from btjunkie if you have software that supports bit torrents. I just got the first episode of the new season of house and of heroes from there so if you do get it you can keep way ahead of people who watch that stuff on tv here.
PS you might need an external hard drive because you can get whole albums and tv series quickly. People tend to get carried away.