I am an Ag Engineer, so I can't tell you about your major, but Colorado State is a great school. The campus is in Fort Collins which is right at the base of the foothills, so there's great mountain access if you're into hiking, fishing, ski/snowboarding, etc. The nickname of Ft Collins is "Fort Fun" because there is so much to do. It's not a super huge city, but big enough that there is always something going on.
The college of Ag seems to be really good. I can try and get one of the other girls to tell you more about your field of study if you are interested.
And our Sigma Alpha Chapter is really great!! We just had a girl transfer into our chapter from another state, and she said she was very impressed with our activities and organization. We are very active and do a lot of community service projects.