Are you just looking to do some basic tuning (like me) ? I run the FP3 and its is well suited towards my bike (1250 kit, cams, intake, slip ons).
If you are looking to get into something more advanced, I'd recommend talking to your local dyno/tuning shop to see what they recommend, but some others have recommended the Dyna Jet Power Vision
2016 Roadster Vivid Black - SE air cleaner / FP-3 / V&H Twin Slash slip-ons w/quiet baffles. NRHS 1250 kit w/ Hurricane Cat 3 cams. Daymaker headlight and Custom Dynamics turn signals.