Well, Lacer, this discussion has digressed. There are several different paths you can take. So to give good advice, I think we need some more info about what you want out of your car, and what situation you're in.

Is your SRT a daily driver?
Are you focused on drag racing? or on AutoX? or not planning to race?
Are you more interested in getting maximum performance or best cost/horsepower ratio?

Some recommendations:
If it's your daily driver, be conservative, and go with a CAI, Code3 pulley, and tune. Also consider a SprintBooster to change the feel of the throttle. This will give you enough power to have a lot of fun, but is very easy to put back to stock if you need to take it in for warranty service.

If it's not your daily driver, and you want the best cost/hp ratio, go with the above again. You may want to add 240's manifolds as well, as they provide significant gains for a good price.

If you want the maximum performance, price be damned:
Then go with stacked pullies (Code3 and the 181), NeedsWings CAI or SL55, NeedsWings Intake Manifolds, ECU tune, better plugs, better tires, better brakes, a better heat exchanger (and THAT is a topic rife with debate), and the list can go on and on because as you know, as long as you have money to spend there are more parts to buy.

All that said, you can't go wrong with the combination of a CAI, a pulley and a tune. The performance differences are there between products, no doubt. But the end result is which ever you choose, you'll turn your SRT into a serious sleeper that will amaze people at the track and blow the doors off people on the street.