Why would you want 100 proof tequila anyway? Certainly wouldn't be any better for sipping.
Pretty much any 100% agave tequila tastes good in a margarita. Sipping is a different story.
But yeah, sipping tequila probably isn't (or shouldn't be) on the radar map for a college student. I was totally ignorant of tequila in college. And $12 was a lot to spend on wine, and only for a hot date!
But if you have to have 100% agave tequila, you have to have it. So on a budget, look for Cuervo Tradicional (reposado, $22 for a fifth in some places), or Milagro Anejo, at $40, the best value in Anejo.
Impressive. I've never seen Chamucos on a menu. Now THAT is the gold standard.