Step 1 - stop using the word fixie.
Step 2 - check out your local craiglist & bike shop for deals and make sure to get fitted (even using an online bike fit calculator).
Step 3 - don't buy into the hype of some flashy "name" brands such as a few you mentioned.
Step 4 - consider getting a longboard instead of a bike, especially if you just plan on using it for on campus.
Step 5 - As @Elvo recommended, I too recommend a kilo as long as you get yourself fitted and order the proper size.
Step 6 - buy good locks to ensure your bike doesn't get stolen.
Step 7 - ride whatever bike you buy and enjoy the hell out of it.

With what you intend on using the bike for, any affordable bike will suffice.