Thanks to Canon UK, I've had a Canon Pixma PRO-1 to try out for a while.
Unfortunately it's gone back, but I have written up a longish review of how I found it to use.http://www.northlight-images.co.uk/reviews/printer/canon_pro-1.html
Hope it's of some interest.
As someone with an iPF8300, it's interesting to see some of Canon's printer developments, although aspects of the PRO-1 perhaps belie its origins in the consumer electronics division.
Print quality is absolutely excellent, but 35mm top/bottom margins on 'art papers' and a 26" maximum print length...