In reply to Graeme G:
Hi Graeme
I wouldn't get over worried about the 300 dpi hype. I see so much talk about this on the web by people who don't even own a printer.
I have printed hundreds of prints to sell to customers and can regularly print up to A2 on paper for your image size.
You can go as low as 100 dpi often for canvas. Infact I have one at A1 from a 5000 pixel long image.
Happy to print your image for modest ammount