the best deal in tuning is in your driveway. if you have a laptop, an understanding of the bare bones basics of how an engine works, and a few free minutes to read some help files and ask questions on a web site you have everything it takes to buy HPTuners once and have unlimited tuning for the rest of your life.
the software only costs a little bit more than most places will charge for a mostly generic dyno tune one time.
www.HPTuners.com
several of our members use the program and can help with any questions you may have.