Best Antifreeze??

My car had orange coolant in it (dexcool), and an aftermarket replacement radiator. I drained it out and did a flush with 100 percent water. I then installed an original low-mileage mustang 2 row copper radiator and flushed the system again. Afterwards, I used traditional green coolant (not sure if it was PEAK or Prestone). It is 30 percent coolant and 70 percent water. I live in south Florida.