I looked at these when the stock ones finally failed on my 03. After thinking about it for a while, I decided to go back to stock.
My reasoning was metal-to-metal is likely to rattle more than metal-to-plastic. Secondly, the HD parts are way cheaper. Finally, my first set lasted a long time before I had to replace them. I just considered them a wear part, and changed them. If only one fails, it's easy to get a replacement at any dealer...
I hate that motorcycle they make me ride. I'm here to tell you there ain't nothing in the world I hate worse than that elephant under my ass.
Officer John Wintergreen reference his Electra Glide.
-Electra Glide in Blue, 1973-