What Osuu said is right, railgun is only a side story. I would therefore recommend you to watch Index first (helps with general understanding).
Well kurozuka's main theme wasn't there, but i'll assume you know them all :3
Eden of the East is pretty unique, if your looking for phone stuff, check out Mirrai Nikki.
No other anime is really like it, but that's what makes it special eh?
Now for other animes suggestion :
Zetsuen no Tempest (recent but really interesting)
Psycho-Pass (recent also)
Xam'd (this one is hard to explain, but worth watching if you havn't)
Ikki Tousen (good show, although is starts ecchi, it slows down a turn on with a more real focus on the story though)
http://www.youtube.com/playlist?list=PL719F3F4932EA8234 (this one is a parody of Kampfer, It's the only parody I ever liked, makes a lot of references to other games shows etc etc.)
The gokusen (kinda like GTO)
excel saga (this one is peculiar, a good comedy)
Squid Girl (another good comedy, not ecchi even though it's at the beach)
Beelzebub (fighting anime, special)
Flame of recca (precursor to the "never give up" attitude fighting manga)
DN angel (somewhat of a wierd story, but can be inetesting if you're bored)
The money of Soul and possibility (really nice one, well thought very original concept well made effects)
Oreshura (airing, a school comedy)
Magician's Academy (particular, I can't find anything to say about it)
Seeing as you've seen lots of animes, if you've seen all of those, I would need a list of what you saw. Otherwise, enjoy :)
Dub or Sub? I will assume Sub since it's obviously superior
http://www.gogoanime.com/category/soul-eater
I like this website because it's dark, and if you get a broken video, you report it and 5 mins later it's fixed (really, i tested it out one time!). Videos are rarely problematic anyways. Lots of sources also.
You can go to next or prev episode at the bottom of the page once you are in it.
Enjoy!
-Jawarisin