Supercharger vs. gears. Either? Or? Both???

[Spenser]

O.K. trying to decide which way to go here. I live in Phoenix and do 80% of my driving in the city and under 60 mph. I'd like a little more pep without having to always put my foot to the floor, you know, normal driving, smoother acceleration without a minor flat spot after shifting into second. I've added headers and exhaust, cold air box, and programmer, but would just like a bit more. Now, if I add the supercharger, my highway driving will surely be much better, say, driving up the mountain to Flagstaff, etc. But will I notice a large difference in normal driving conditions below say 2000 rpm? On the other hand, if I go with the 4.56 gears, I'm certain the town driving will dramatically improve, but will I lose the ability to drive say, 80-90 mph on the highway without really winding her up? I appreciate the thoughts and response. I'd consider both if there were a real benefit here. Thanks.

Kevin (casey2)
2005 Stealth Gray H2 SUV
2006 Ford Expedition Limited