The decision to go to Arch has been made, and if I were there, I probably would. But for others consideration, I will say that powder coat (PC) is generally a good coating if its done well with good surface prep work. Otherwise, PC can have disadvantages like hiding corrosion under its surface undetected because its a hard shell. Paint can do the same, but because its softer, the surface will bubble and reveal corrosion sooner than PC. Paint is easy to remove, fill, reapply and blend. Paint will flex. If you don't mind doing touchup work with a rattle can for chips and modifications, paint surface repair is fast and easy and inexpensive.