so when i originally bought my QSI 6120 i saw that it was an interline chip so i went with the I-series.
Someone from QSI later told me he thinks the E-series would be better for it, and asked me who suggested the I-series.
One thing i know is i really struggle to get the reds in the cores of my galaxies. i know the difference between the two is something about being more sensitive to reds. actually ive heard the only difference is the red filter but i dont remember.
I am going to start adding Ha to my galaxies, hopefully this will help too, but i would like to hear from any experts out there what they think.