As i have said on many posts previously i really believe you will not beat a kpro as an ecu in a road/trackday car. (or anything that retains i vtec)
It will give yo the best cold start and part throttle drivability Full stop, as this is effectively using Hondas maps for this.
If i was building a no expense spared race car with VTEC killer cams (a la BTCC) which remove the vtec/ivtec then AEM/Autronics, Motec or Toca (TGM have one in the 24hr car) would be my choice,
Adding a water temp guage is possible using the aem as long as you use their guage too, but its expensive..
The only real advantage i can see is the onboard datalogging and even that on an NA car isn't worth much
live mapping , traction control (only when accelerating)