Digital BW, The Print

Hey all.  I've done my homework on inks, continuous inking 
systems and printers, but haven't had the chance to price papers 
yet.  Where are the cheapest prices found on the net?

I'm looking for some Epson Archival Matte for proofing and the 
Hahnemuhle Photo Rag (lighter of the two).  I'm open to other 
papers as well, but prefer a smooth surface and have heard that 
the Photo Rag prints very deep blacks.  Are there any other good 
papers that I should look into?  

Thanks for your help!

Andy