looking for some opinions on which one of these to go with and any ups or downs of haviing them. i pull a 6x12 trailer loaded down with 4 streetbikes all over the states.

so far i've added a banks 4" complete exhaust and k&n filter to my 2001

I have the ppe valve and i can get 24 psi , with the programer on level 3 the ppe( without 18 to 20 psi) valve is easy to put in

To create additional boost you will first need more fuel. On an otherwise stock truck, you probably wont see anymore than the truck can build with the stock wastegate.

I max at 26. My boost has been the same with an edge juice w/ attitude no boost valve, ppe economy on 3 w/ ppe boost valve, and stock with ppe boost valve. I didn't gain any boost with the valve but it does say it gives you a more complete fuel burn???

as said before you need a tune to see any benefit from either of these with my PPE boost valve I hit 32psi

I would do the boost valve, it will give you more boost and it much cheaper. Like stated above you need a programmer to see the increase.