Pretty much a straight forward install. The new tank and pump fits right up without having to buy other/extra stuff. Wires fit into stock harness and all. Biggest hassle is removing and installing the blue vent canisters.
I paid $699 ($725 delivered) for both the Cobra baffled tank and dual pumps. I got it from Randy Stinchcomb over at Modular Depot forums. Pretty much the best price I could find without buying used (and not much luck finding a used tank and pump).