I agree on keeping the split rims if they are not the RH5's. Also don't powder coat. Powder coating has it's place, but it's thick and chips easy. I have been thinking about this some also and I believe I will have my rims plated locally and then paint the exterior.
This way they won't rust on the inside and the plating will be more durable because it won't chip off as easy.
Just haven't located a zing plater yet. I may check into galvanizing, although it can be heavy in spots it shouldn't be as bad as powder coating!