I don't have a single idea what tequila brands do you have in the US, but the best tequila at a reasonable price is Don Julio, and maybe Tradicional.
Ways to drink it? I really prefer shots, either taking them slowly or fast (beware this, you get drunk pretty fast

). In Mexico we have what we call the mexican flag.
You prepare three shots, one with lime, other one with tequila, and one with sangrita. So this from a green, white (kind of white), and red. Which is the mexican flag colors.
Then you drink it like this: give the lime shot a sip, then the tequila (all of it, and fast

), and then the sangrita.
Why lime and sangrita? The lime helps you enjoy the tequila, I don't know why, but it helps. And the sangrita makes the tequila flavor in your mouth disappear, so you are good to go for another tequila shot.
