At the risk of being repetitive, here is a website with FAQs
and such that provides just about everything you'll need to
know about headlights.  (Not suggesting buying there,
however.)  This site recommends very strongly against the
Vision Plus models (calling them "vision minus.")

http://lighting.mbz.org/

The URL for IMPARTS (which I've dealt with a lot) is

http://www.imparts.com/

(surprise)  They don't show the headlights there, but you
can get a catalog there.

I have the e-code Hellas and am nevertheless anxious to try
Cibie, which can be found (cheaper than Stern) at

http://www.talbotco.com/cibie.htm