If you've worked on the starter, I'd assume it's not even cranking. I wouldn't suspect ignition yet.
Did you pull fuses and check them with a continuity tester? Double check fuses AM2 15A and MAIN 30A.
Check the ignition switch and transmission neutral/park switch, or clutch switch if you have MT. Check the ST relay in the junction block under the dash. You may need a wiring diagram and may need to jumper over ('hot wire') some of these to check them out.
As far as I know, this car's ignition control is done by the ECM. Worry about that after it cranks.