Yup. Properly processed, Fuji's E-6 offerings are archival. Not to the degree that B&W film is, of course, but on par for modern E-6. And Provia's just the ticket for natural looking photos. The Velvia 50 is magic though! But it doesn't work so well for people, as iandvaag said.
I can also second the DR5 lab for B&W slides. I shot a roll of Ilford HP5+ (an ISO 400 film) at EI 1600, sent it to them and told them what EI I had shot it at, and got back some goregous B&W slides. If you want high speed B&W slides in DR5's process, HP5+ is the way to go.
You might also consider a stereoscope along the lines of a Holmes stereoscope for viewing. These will let you view printed stereographs. I inherited such a viewing device along with a set of stereographs from my grandparents. This thing is roughly 118 years old, as it has the inscription "Universelle Exposition Internationale 1900" on it. It inspired me to go buy a stereo camera myself and try my hand at stereo photography. The first roll I ran thru my Stereo Realist was a roll of Fuji Superia Xtra 400. Only because I couldn't get my hands on any Kodak color negative film at the time!