Any thought on gears?

[BlackSTX]

After having had my tunes for a while now, and having adjusted to the performance of the truck, I now want more acceleration. Sure, like many of you I'd prefer to add some power adders, but a supercharger for a truck with a 4.6L in it isn't easy to find, or really in the budget; so I'm left with the idea of swapping the gears.
I currently have 3.55's and the stock size tires but am considering something in the range of 4.10 to 4.56. Have any of you swapped into this range, and how has it helped?
I don't do much highway driving so any mileage loss isn't really an issue to me; I'm more interested in acceleration and responsiveness.

Give me some ideas, I've posted this elsewhere a while back, but the bench racers there gave me ratios a bit too extreme, and I'm looking to be realistic and streetable. After all, this is my daily driver, not a weekend warrior.