CAI and exhaust are always a good start, but budget is going to factor in as far as any suggestions.
I like the Mopar CAI personally (don't actually have one - just have a generic intake - but it's on my list). Between $200-300 usually; sometimes you can find someone selling a used one for less but they typically go fast.
There are TONS of exhaust options, from SRS or Mopar or other manufacturers' cat-back exhausts (most expensive) custom-fabbing your own with whatever mufflers you want (mid-range pricing) to slapping on the stock exhaust from a R/T or Daytona (cheap or even free, and what I did - by the way, please please PLEASE stay AWAY from the SRT exhaust! It is NOT a good idea; the pipe diameter is way too large for our engine and you will lose too much low-end torque). In the end it'll be up to what you want and how much you can spend.
The Diablosport Predator is your tuner and couldn't be simpler to use. Like mentioned above it'll run you around $375. Don't forget to get the cables with it, which run another $30-50.
You might consider headers as well, though the parts will be right around $600 and the install will cost you more than that usually. You might also want a custom tune if you go with headers, which will add another $300-400.
Are ya broke yet?!
