Datacolor User to User Support Group.

it took me a couple of months and tons of ink and paper for correcting
the printer profiles for the Epson 2100 (=2200) with oem inks on matte
papers. there was a difficult green-yellow cast. (the datacolor support
in switzerland was not able help. (however very kind people. they took a
lot of time examining the problem, directly at my printer).
it is still not possible to print pure blue, it goes purple; i think in 
"Spyder 3 Print vs. Other Choices". Some profiles of the paper
manufacturers DO print blue.
spyder elite: i like the many choices of advanced mode. however you
cannot correct the profile afterwards.
 you need some patience for recalibrating. 
it to seems to work well with my Quato Radon screen.
It was not possible to gray balance an older samsung CRT. (strong green cast).
good luck. christoph