How many miles are on your auto. If its over 100K I would stay away from any power increases. It it's got low miles go with the EZ.
If in the future you know your going to upgrade your tranny and will want more power then go with Comp and don't attach the pump wire. A comp with the pump wire not taped is the same as the EZ.
I have a 6 speed with a EZ and AFE megacannon and it tows great. If your looking for a Hot rod Tow rig that is quick stay with an auto. 6 speeds accelerate a lot slower then auto's, theres more shifting and lost of boost. But a upgraded clutch is only $600 compared to thousands you can spend on a bad ass auto.
If I was you I would go with a DTT auto, Edge Comp, DDII's injectors, AFE Megacannon, Straight pipe, Gauges. That is one sweet set up
