Tsk, tsk.. Thread belongs in Peripherals!
LemonLaw found some Canon iP6000D at Outpost.com . Those are true photo printers with six ink tanks (1 black and 5 color). So you will go thru black tanks quickly if you do a lot of text (relatively low volume of ink in the BCI-6 black tank).
. The Canon MP-780 mentioned in an earlier post can also be found. My local Staples still had one last Friday. Other than that there is eBay and For Sale/Trade forums for finding the original iP series printers. Many are going for well above selling prices when they were current. Any Canon of the old line will pay for itself over time in ink savings - almost no matter how much you pay for it to begin with. The old tanks also have a bit larger capacity than the new ones and some companies (like swiftink.com) cram even more in there.
. re. the new Canon iP series. They print at least as well as the earlier models. You could always buy one and hope and pray that someone manages to clone the new tanks soon. In the meanwhile, someone has some newly formulated inks to match the new Canon for doing your own refills. The inexpensive new Canons have integrated head ink cartridges like HP and Lexmark - avoid those models like the plague.
I didn't see that anyone had mentioned the Brother MFC all-in-ones. The new series (420, 640, 820, etc.) print significantly better than their earlier models (not up to Canon iP standards - but few are) and perhaps they don't suffer the print head defect that plagued the earlier models- too soon to know. The MFC-640 is $150. AR at Staples this week. These are the only remaining units that still use passive ink tanks. The cloned Brother tanks aren't as cheap as the other brands largely due to lower production volumes (Brother is nearly off the chart in the inkjet market) and the complexity of the tank - but they do contain quite a bit of ink.
re. Epson. The chipped Epson ink tanks have been cloned for a long time and are available cheaply. I think one key to avoiding most of the clogging is to print something at least daily. Keep the spitoon gasket and face of the head clean (cleaning sheets are available to keep the face of the head clean - use cotton swabs and distilled water on the spitoon gasket). Also be very quick when changing tanks. I have suggested a tag-team approach: one to remove the old tank and the other to pull the tape and insert the new one. I think the extra fast-drying, pigmented ink has a lot to do with the Epson "clog at the drop of a hat" reputation. And the reletively cold Piezo technology of their print head is a big part as well. Epson also has the advantage of being the only general-purpose IJ printers that can directly print on DVD/CD media available here in the States. The pigmented ink can also make photo prints look a bit strange relative to the dye-base inks that most others use.
. I would also suggest using clone ink tanks from the get-go. I think they put something in the OE ink that causes the cloned ink to clog more than it otherwise would - better to have none in the system.
. Buy decent brand of cloned ink (not the cheapest) that will be around as long as you own your printer, so you will always be using the same formulation of ink, etc. I've heard that Epson is clamping down on tank cloners that didn't use a clean-room method to clone their tanks, so the availability and price of Epson cloned ink tanks may be changing radically soon. Make sure the printer model you decide on uses tanks that have already been widely cloned - not some new model. I'm sure at least a few of the cloners used the clean-room technique to do the cloning, so they shouldn't all disappear. Key is to find one that will be among the survivors.
-->> But the first thing I would suggest is to try a new print head for your S600. User replaceable and not too expensive. This is a necessary, "wear and tear" repair item on recent Canon printers. If it was any other brand I'd say send it off to the landfill, but it's a fairly recent Canon with high quality output (when functioning properly). Unfortunately they don't accept returns on heads that don't solve the problem unless you send your printer in to Canon for "service" where they get to decide you really need a print head, and charge you double for the privilege.
good luck,
.bh.
PS. Did someone say they got ~$150. for an iP3000 - seeing Bye-Bye in cartoon balloons around mine... Was that a new or a used one that fetched $150. I think I paid around $70 for mine AR. .bh.