[swank501]

Coilovers are more performnce oriented. You will get longer travel and more damping. The hold more fluid and will not fade as quickly when you start beating on them.

Spacer lifts are just a means to lift. You will stil have the factory shocks but the ride may stiffen up a bit due to the added load on the suspension. I don't know how it affects these truck because I don't have one, but in previous exp it has stiffened a little.

Both will put added strees on the upper ball joint which can be fixed by uniball a-arms.

You just have to ask yourself what you will be using the truck for? If it's just for looks, get the spacer. If you plan on any offroad excursions or baja racing down the beach, then get the c/o's