Last year, I polished my stock housings, as they were becoming cloudy. They looked great, but by one year, they looked pretty bad again, despite using the UV protectant.
It was a lot of work to polish them, and I found a set of decently priced housings on Amazon, so I figured I would give it a try. I got the silvered housings to replace my factory black housings. I think it looks much better.
These are Eagle Eyes and cost $85 from the link below.
The light output is excellent with Silverstars, and the light pattern is decent, although a little ragged on the top edge. They are much easier to adjust than the stock item.