Joya De Nicaragua Antano 1970 Consul would be my first answer. It is almost always available, can be had as low as $3.50 a stick, with three weeks rest it is good and three months make it top notch. They also stand up well to rest times of a year or more.
Man O War Puro Authentico or Lil' Devil would be next. Whenever I think to myself, "time for box stuffers" those are usually at the top of my list. They can be as cheap as $2.20 a piece, they are pretty consistent, well constructed, take well to resting, and the flavors usually hit the spot.
Joya De Nicaragua Cuatro Cinco might be my pick for best value at regular prices from Neptune and Atlantic. Martes 13 from Asylum would be a close second, but they are limited releases.