I have a 03 s.c. GTX I have done a few mods. I am wanting to know what is a better route. change the ecu with something else or just reprogram it.

What 215 ecu will still work my dash items the same.
What reprogrammer should i get. I see a lot of users on here using everything.
I plan on doing some internal work on motor and head this winter so i can use a higher rpm and boost limits

I ride on lake erie so i have a mess load of chop.