Hi,
I'm sure we all believe we're in the "best" fraternity. It's really a matter of which one is the best fit for you and your friends. The important thing to know is that Greek life isn't all parties -- there's a lot of work involved, too. That's particularly true of the colonization process.
Take a look at
www.delts.org
There is a section of info on how the fraternity works, constitution, bylaws, etc. as well as information on ideals and other things you might be interested in.
Good luck.