For a modern car, if it has wires, stainless steel makes most sense as although spoked alloy rims can look super, I'm suspicious that electrolytic corrosion between them and the spokes could occur.
I was suspicious too, Martyn, but it hasn't happened in more than 25 years to my Borranis. They have only very seldom seen salty roads, though.
BTW chromed spokes are more brittle than painted spokes, in the 60's Aston Martin DB4's were known for broken spokes because of this - but they have a bit more torque and weight than Morgans...