I highly recommend dual intakes.
You can go with NeedsWings, DIY it or use an SL55 intake, but since the real restriction seems to be up front you might want to consider adding your own scoops if you go the SL55 or DIY route. I added scoops to mine up front, and they seem to help.
PS: I was going to try a DIY CAI but a major silicone/aluminum tubing manufacturer said I would be better off with thenneedswingsnunit.
Why? It's a pretty simple build, and it's several hundred bucks cheaper (< 400 for a full 3" dual setup). Obviously DIY or kit both work fine, so if you want to save some time you can pay for a NeedsWings or Fabtech kit.
Anyways, regarding other mods:
1) 11.3-11.5 is a *richer* AFR than 12, not leaner. Remember it's air/fuel, not fuel/air, so the lower the AFR the less air per unit of fuel.
2) I like the idea of a smaller SC pulley. I'm running a larger crank pulley, which works out to about the same increase for the SC, and it definitely makes a difference.
3) Plan on upgrading your cooling next (see 4-5). When you start running more boost you can expect to see your IATs rise. You're in Florida, so 90F ambient isn't totally unheard of.
I decided to upgrade mine after seeing what my IATs looked like back when it was 95-100F this summer...
4) I'd recommend isolating your IC system from your main cooling system. It's super easy to do -- about 20 bucks worth of parts and maybe 15 minutes in your garage. You can get the necessary brass fittings at just about any home improvement store, and silicone heater hose is equally-easy to find online.
5) If you're planning on running even more boost later on down the line, and since you live in a hot climate, you might want to consider running a bigger heat exchanger. You can get a suitably-sized one for about 150 bucks, plus figure 30 bucks for hose and brass couplers. You'll also want to take that opportunity to upgrade your IC pump to something that won't commit suicide, specifically a CM30 or CM90 (the latter is only a good idea if you're running a bigger intercooler and/or reservoir.) The CM30 is about 100 for an open-box one via eBay, or more -- maybe 150 -- for a new one via a ton of various sites. It should last the lifetime of the car.
That plus a good tune should get you around 330 to the wheels. (At least it did for me...)