Ok… time for the Mexican to have a say.
If you want a quality tequila you need to first figure out what kind you like.
Tequila Blanco: Clear liquid with a higher alcohol content that makes it potent and gives it a strong flavor. (55 ºGL).
Tequila Joven (young tequila): Color varies from golden to amber and has a slightly lower alcohol content (in Mexico the GL scale is used) between 36 & 46 ºGL.
Tequila Reposado: Mostly 100% agave with a slightly woodsy taste and a 38º GL score.
Tequila Añejo (aged): Flavor with strong hints of wood with an amber or copper color, plenty dark and plenty delicious.
Tequila extra añejo (self explanatory i would think) :Has to be put through a maturation process of AT LEAST 3 years. Tastes similar to añejo.
100% agave tequila and those that say “Tequila 100% puro agave”, are produced using only agave derived sugars.
Having said that ONE of the previous suggestions is a good quality tequila (Hornitos by Sauza) but i would strongly recommend you try:
3 Generaciones,
1800 (reposado is better for this particular brand… liquid orgasm i guarantee), Herradura (also reposado),
Don Julio (both kinds)
(the last 2 are moderately priced and well within your range)
Corralejo and Tradicional are also good choices.
Hope this helped. Enjoy and Salud!