@maxs
I have a scrapped Imageprograf Pro 1000 in my office now. It lasted barely 2 years with a jammed ink cartridge (a known design fault reported in American Canon community forums). I have sold on nearly £1000 (£s not $s) worth of ink I had in a cupboard. It drank ink and regularly filled the maintenance cartridge. It printed beautiful prints but is seriously flawed. A fix for a jammed ink cartridge cots more than a new printer - it requires a back to base engineer strip down to correct. Yes I probably could have ripped the jammed cartridge out as many in the community forum have done but there are many other reported problems. Please read all the forums you can before deciding. I bitterly regret buying it. It needs a usage or a nozzle check every 60 hours or it will carry out a full head clean and dump huge amounts of expensive ink. Anyone printing very regularly may not suffer so.
Canons customer service were terrible and this is another reason not to buy Canon. My scrapped printer looks like new and has probably produced only 50 A3 prints and less A4 prints so these were very expensive as I probably also changed all cartridges twice in that 2 years (£1200 worth of ink). I had to invest in a UPS (Uninterruptible Power Supply) since powering off triggers a head clean the next time you switch it on. Despite Canon marketing this printer as suitable for enthusiasts as well as professionals it really only suits those with a high throughput.
However its thirst for ink and an ink cartridge jamming issue these are only two problems. Read the forums for others reported.
Another reason to buy Epson might be the healthy 3rd party refillable and CIS (continuous ink supply) systems that were available though not for P900 yet.
Like @maxs, I am also in the market for an A2 printer. I am currently looking at the Canon Pro-1000, Epson P900 and Epson P5000 STD.
Canon is the cheapest, but it has a few problems like the ones you've mentioned. I did not like the fact that it cannot print borderless for custom paper sizes. Panos are limited to 1.20 meters max. And there was one dire warning of the printer flushing all of the ink when the printer is moved while it is switched on. And the horrible 60 hour cleaning cycle, which is happening even when one has printed extensively during that period.
P5000 has the built-in roll paper and the paper cutter as well as being more dust resistant. Also, the handling of the roll paper is automatic. But it is huge and the most expensive of these three.
P900 has one huge flaw, it is nowhere in stock. Also, it seems to have a flimsy build quality from what I have seen on youtube videos. It is pricewise halfway between the other two when one also buys the roll paper unit. And the dreaded 50 ml cartridges. Lastly, I haven't heard anything about the paper handling and skewing problems as of yet. I don't know what the reality will be like when the printer is generally available.
So considering these pros and cons, I am undecided what would be the best choice for me. I am an amateur photographer who wants to print his own pictures but not in huge volumes. Another option is to use labs for any prints but I haven't been able to find one which I really like (paper surface, structure, quality, color management). In the past I have had the Epson 3800 and it was a great printer until the print head has clogged eventually and would not be un-clogged no matter what I've tried.
Any advice you can give will be greatly appreciated.