I've been printing on Multigrade warmtone resin for the last 6 months and love the stuff ;-) My fiber experience is limited but my only trouble has been flattening the prints. I am not concerned about being truly archival but like the 'feel' and texture of some of the fiber prints I have seen.
I am interested in the different to the actual feel between Ilford's warmtone resin and fiber. Do they feel similar? If the only advantage is archival-ability then I think I'll stick with resin but if the paper itself is more 'interesting' then I think I'll try fiber.