its all a matter of opinion. i like to see what kind of power i can push out of 4 poppers, but 5 liters are cool too. im workin on one now that when im done playing with my turbo'd 4, i will see what the 5 liter can hold. i had a friend that spent a bunch of money in a 5 liter and he took it to the dyno and cracked the block under the intake. it made some power for the money he spent, but i never cracked a 2.3, and i have had 5 of them.