Best way to add power to a 00' Dodge Durango?

I have a 2000 dodge durango and i currently have the following upgrades



-Superchips power programmer

-Custom intake

-poweraid throttle body spacer

-custome exhaust with cherry bomb

- K%26amp;N air filter



What would be the best/most effective way to add more power that would cost less than 100$ preferably i dont to spend a fortune im just looking for a little more powerBest way to add power to a 00' Dodge Durango?
tune for Race gas and you will stay under budget. otherwise get the march underdrive pulley setBest way to add power to a 00' Dodge Durango?
I love Dodge Durango they are great looking suv!