Ahhh.. you cought my attention with the "GALAXIES" bit. I like your shots! My experience with my 350D (un-mod) on these types of objects hasn't produced much yet, but only given it a quick shot.
Seems you have a reasonable amount of dust on your chip? Quite a few dark spots, I'm guessing that's what it is. But it doesn't detract from the good detail in the galaxies.
MX7C - good comparison to know, interesting that they perform similar.
Look forward to seeing more.
Roger.