I am not loyal to any company but I am very pleased with the 87 Octane Tune I have on my 2015 Sport from
http://www.diablosport.com/
There are 2 tuners they offer..The Trinity and the Intune. I have the Intune tuner.
http://www.diablosport.com/product-search.html
93 Octane Performance - This tune is designed for use with premium fuel. The Performance Tune will unleash the maximum available Horsepower, Torque and Economy out of your stock vehicle with no other mods necessary! Vehicles will see a power across the entire RPM range with the greatest gains down low. Vehicle will also see improvements in drivability, throttle response, and economy.
+70 HP & 70 Torque
91 Octane Performance - This tune is very similar to the Performance tune for 93 Octane but optimized for the 91 Octane Premium Fuel found in some states. Vehicles will see a power across the entire RPM range with the greatest gains down low. Vehicle will also see improvements in drivability, throttle response, and economy.
+60 HP & 65 Torque
Modified Stock - This will allow you to keep the vehicle at the stock horsepower and torque levels, but the user can still change all the available adjustable parameters for the application, like the speed limiter, speedometer calibration, etc. Modified Stock also allows you to "marry" the tool to the vehicle and make a copy of the stock tune when requested by a CMR Dealer (custom tuner).
+ NA HP & NA Torque
87 Octane Tune - This tune is designed for use with 87 octane gasoline. It will increase HP, TQ and Fuel Economy without the need to run premium fuel in the vehicle. While HP Gains are not as great as in the 93 octane Diablotune, this tune wakes up your vehicle's throttle response, power, and improves overall driveability.
+ 60 HP & 65 Torque
Mileage Booster - The Mileage Booster tune utilizes the vehicle's DOD system to optimize efficiency for daily use. Horsepower gains will be minimal, but mileage will improve by up to 3 MPG in some applications! Compatible with fuel that is 87 octane or greater, and only available to vehicles that have the DOD system from the factory.
Also, MikeL's customer service is mind blowing.