I've never tasted El Mayor blanco. The anejo is pretty good and reposado is OK. You must have it confused with another brand because I don't think I'd recommend El Mayor at the price point.
And for reference, most US tequila is 80 proof. KAH reposado is 110 proof and Agave 99 is 99 proof (clever name, no?). Peligroso is 84 proof. Those are the ones that I can think of offhand.