what is the best small block and why ?

340 , have 2 now and they are stronger than the 2 360 (2 cranks waked) and 2 318( 1 crank went bad ,2 timing chains and cracked piston) I have had in the past . Better crank , better timing chain and gears , better pistons cam and heads . 360 and 318 cheaper ?? I don't see it .