After much experimentation and lots of testing, here it is. The trick to a great margarita is to use an inexpensive silver or blanco tequila. If you use anything better, you're wasting good tequila and we don't recommend that. Ever. Additionally, we have found that the Simply Limeade brand of juice offers a perfect balance of lime and sugar, thereby eliminating the need to make a simple syrup. Viva la Margarita!
Strain the drink into an ice-filled glass, with a salted rim or not and serve.