I asked earlier about the Auto Meter 0-15 psi fuel gauge being enough for my brothers 02 stock 2500 CTD.. he's decided too go with the 0-30 psi but the question we have now is which is the best model of the Auto Meter fuel gauges, being that they are all within the same price range of 200.00-225.00?? the Cobalt, C2, Phantom and Phantom II, Sport-Comp, Ultra-light, and Z-series. any feed back would be a major help thanks, Colby.