Topic: Needing help with finding the right tuners and after market chips

[5.0mustangluvr]

I have a 92 5.0 and I want to upgrade to an aftermarket chip. There are several out on the market and like everything else is this world not all is built and performs to what the specs say. So I ask anyone with any type of knowledge on the situation for their input.  I found three with three different price tags. Don’t know if some of the more expensive ones are just upping the price of the product or if it is TRULY a higher quality product. The three that I found can be found at the fallowing links:
[/url]http://www.performancechipsdirect.com/Ford/Mustang/ , [/url]http://www.americanmuscle.com/sct-4-bank-computer-chip.html , [/url]http://www.autoanything.com/performance-chips/61A1777A0A0A2600576.aspx
These are just the ones I have found thus far in my research. Any help would be great!