Digital BW, The Print

Not having seen any of these papers, their descriptions are pretty much 
meaningless to me, so perhaps someone can give me some advice.

First, I was wondering what the heaviest paper is that will feed 
through the 220 (and why Epson doesn't put a rear slot in).

As for papers, I am interested in two types of paper for printing fine 
art images using the MIS EZW inks:

First, I'd like a white matte paper with finish like traditional fiber 
paper.

Second, I'd like a natural paper with a watercolor paper texture.

Thanks.