Montecristo is commonly considered the benchmark that all other Havanas are judged against.
Even though it's rather new (by cigars industry standards) and founded in 1935 it made a name for itself as one of the most popular brands of Havanas and probably one of the most popular Cuban cigar in the world (Montecristo 4 certainly takes the crown of the most sold cigar in the world!).
Its name, which is not hard to guess, is derived from the famous novel The Count of Montecristo. The Montecristo brand has a wide range of products to choose from, fitting nearly any budget.