Epsons drink ink like there is no tomorrow, Also epsons have built in PrintHeads.. So if they fail you have to replace the whole printer.. Or if there blocked you have to waste ink to clear the blockage
On most of the canon range they have removeable printheads which mean if its fault you can replace, and if its blocked a ink refill shop can clear it for £10 or even less
Also we are not talking about CISS ink systems here really, I doubt Tigger is going to use it for big domestic use so the constant feed system will be always cheaper in the long run but no one wants that for a home PC.
And anything dell related for lasers is a no no too, HP/Canon join up when it comes to lasers so they make pretty good mono's and colour laser printers
Edit_
Also the price i quoted are in shops, you will ALWAYS get ink refills cheaper on the internet