My reasons for upgrading were for looks. I've already gotta buy new ones cause the system is 12 volt now. Plus a sealed beam conversion isi def. the way to go. The bulbs are cheap and easy to replace, plus the wiring is already set up for it (based on the donor chassi).
All the $40 sets look to be non DOT approved so far. So I've started searching some of the webpages hoping to find some. I'd def. need them to be useful, not just for show.