Amount of smoking time + cost per cigar + enjoyment of cigar when smoking + amount of aging required before reaching smokeable level = B.B.F.Y.B.
This then becomes a matter of opinion. Robustos are quick burners when considering the amount of tobacco per cigar. They have an abundance of seco leaves with considerably less oil causing a quicker burn time. PCs generally take a bit less time to smoke (maybe 15 minutes) yet cost 2/3 the price. Generally Corona Gordas are a bit better smoke time and complexity level when compared to Robustos but cost almost the same. So, I would think they are probably the best size for the catergory. Brands that take the least amount of time to come around are Hoyo, JL, possibly SLR and Punch (ONLY when considering one of their CG's; the Black Prince. The others take way too much time). Of those, I would consider these:
Hoyo Epi 1
Juan Lopez Sel 1
San Louis Rey Serie A (Matter of opinion more than the others. I love em young)
Punch Black Prince (haven't had a lot but they seem to be the best young CG from punch)
Now, if you're someone who just wants a decent smoke for CHEAP,
Any Jose Piedra
Bolivar Chicos
Partagas Mille Fleurs
Ramon Allones Bits of Havana
Have fun with it all...