Canon also makes a line of printers with refillable ink tanks, no chip involved. I've owned one for a couple years now, and I helped my father set one up about three months ago. Rough back-of-the-envelope math suggests a cost of 1-2 cents per page if you're printing in color, less than that if you only print black & white. (The black ink bottle costs the same as the color bottles but is larger).

Epson also makes ink tank printers, but I don't recommend them because the Epson I used to own refused to work until the "maintenance cartridge" (a special sponge that absorbs the ink used to flush out clogs) was replaced, and it's not user-serviceable. (Technically you could do it but you'd void your warranty). So when my Epson died, I replaced it with a comparable Canon printer. Canon will sell you a maintenance cartridge for about $10 (plus tax and shipping) right on their website, and I'm sure some retailers would carry them too (though I haven't looked). I haven't needed it yet, but it's good to know I won't have to buy a new printer because I couldn't replace a simple sponge buried deep in its guts.

I wouldn't buy anything from Brother. Their website is Ugly, search has never works properly, printer is thin plastic flimsy, cartridges also thin flimsy plastic. Even downloading their software is horrible!