If you can afford it, OEM Mopar radiator, unless Hella Behr or Nissens sells a radiator. The Chinese or Taiwanese ones vary in quality. TYC/Koyorad and Spectra Premium seems like the better of those.
Stick to G-05. The Mopar HOAT is orange in color, while Motorcraft Premium Gold is yellowish. The gold bottle Zerex is clear, so it's not a bad idea to use a coolant tester or refracto/hydrometer to verify concentration. Mix it with distilled water. CA does have hard water unless you live in SF/LA/Tahoe or the EBMUD district.