I've spent several days researching the various bulk/refill options for
Canon printers. From the various posts I've read, compatible cartridges are
not the way to go, but refilling is.

In the US, what provides the best match to OEM inks, and which provides the
best value?

Target printer is the i560 or i860. Thank you.

I've seen:

re-inks.com / atlanticinkjet.com
inkjetgoodies.com
alotofthings.com
weink.com