Q: Any advantage switching to factory alloys?
I did exactly that on my '90 Westy last summer, switched from factory
steel to alloys.  Kept the same tires, moved them over.  Yes, there is a
slight but perceptible difference in ride, but very subtle.  I attribute
this to the alloys being 1/2 inch wider and accoding to people on the
list a slightly wider offset.  I made the change for other reasons, but
am pleased with the result.