Most accurate aftermarket ink

[Sharkbait]

I run a Canon S9000 as my primary photo printer (6-tank), and I dread $11ea for the 6 tanks to replace. Any tips on what the most accurate aftermarket ink is? I currently use http://store.yahoo.com/4inkjets/bci56inktans.html and am unhappy with the results--the prints tend to look very cyan-heavy and even have a slight greenish tint at times.