"equally capable" is probably quite debatable. I also didn't know that HP and Canon made 13" printers that were "reliably archival". Epson's certainly are, but that would have to be something relatively recent for HP and Canon.
[a href=\"index.php?act=findpost&pid=95529\"][{POST_SNAPBACK}][/a]
Michael and other reviewers have noted that print quality made with the latest HP, Canon, and Epson printers is about equal. There are subtle differences, but that's all -- subtle.
HP has a 13" printer called the B9180. It has been reviewed here and elsewhere. It uses archival pigment inks. It is "relatively recent" in the sense that it's less than 3 years old.
Canon does not yet have a 13" pigment printer. But of course their 17" printer, the ipf5000, can certainly print up to 13" wide and the cost of ink would probably be less in the long run than any 13" model, so this should be taken into account, too.
Eric