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I think for under $2k it will have to be a Newtonian. And EQ6 will only carry so much, so I will second Colin - a 10" f/5 should be a one of the best options. I would personally go for 10" f/4 as it would be a bit lighter and easier to guide, but more challenging to collimate. Also, drizzling good quality data can always give that extra detail.
Thank you Colin for clarifying a few things, for me anyway. As for telescope options, would a 140 mm triplet at f/6.5 with ICX814 (0.84"pp) yield similar data to say RH300 or 12" fast Newton, or would diffraction get in the way with a 140mm aperture? I understand that a refractor would be slower with the same camera.
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