I'm a fan of 7 Leguas Blanco and chamucos Reposado...
The 7 Leguas is made in the old style - with the mash being ground with a stone milling wheel turned by a mule who walks around in a circle powering the wheel. Since 1952 - so it's one of the older more "traditional" tequilas.
www.tequilasieteleguas.com.mx
The Chamucos is just freaking fantastic.
http://www.tequilachamucos.com/
Both run about $50-$60.