Digital BW, The Print

Hi all,
     This isn't strictly B&W related, but there's a lot of expertise 
here so...
     We have an Epson 9600 in our general public (not printing/graphics 
oriented) lab.  We've been feeding EEM through it so far, as it meets 
the rather pedestrian needs of our main user group.  However, we'd like 
to start offering something archival, as we want to market to some fine 
art folks.
     Do you have any suggestions as to an alternative to EEM that is 
relatively affordable (EEM is about $110 per 100' roll, so somethign in 
the $175 range is probably the highest we could consider, in all 
reality)?  GSM isn't an issue (EEM hasn't seem to light weight to our 
users so far).  Paper brightness is, though, as I don't know if our 
users will understand the conflicting issues of brightness and archival 
quality.  Is there anything that would come close?
     I'm just not familiar enough with the wide-format paper options out 
there to really know, especially once you throw in the price factor (the 
papers I choose for my 1280 are way too expensive to be options).

thanks,
allan