You won't see 30hp from a tuner. 10ish might be possible on a stock engine. Maybe a little more if you've got other mods already.
Don't waste your money on a JET product. Their "module" only provides generic tunes that apply to all vehicles, and has actually been proven to decrease hp on the 3.0.
Bamachips is an SCT tuner. They use SCT products like the X-Cal, but no longer write any tunes for Rangers, only mustangs, lightnings and the like.
For the best results, go with the X-Cal. It will allow a tuner to write 3 custom tunes that can account for your goals, fuel type, and any existing mods. If you've got a long list of mods that you still want to do, wait, and do the tuner last. That way, you can account for all of your mods with the tunes.
Rogue has a great reputation, especially within the 3.0 community, but you can find a local SCT dealer by going to the SCT website too.