I would definately go for the Mak for all around use.
I own two of those 6" F8 Achros. tube assembly ( stalled binocular project.
The CA colour renders them useless in my opinion at about a 12mm eyepiece . ( 96X ) At that power white stars have a blurry yellowish tinge and things are not looking crisp. My favorite EP is an 18mm Radian and 24mm Panoptic . Jupiter , at a useful magnification is bathed in out of focus color, and lunar craters have a strong pruple fringe. Saturn is about the only thing that looks great at high power because it is so monochromatic ( yellow ) allready.
I think they are of novlty value only , in the sense that they give nice looking view at low power only.
The rack and pionion focusser units are _really_ bad, loads of play. I look forward to the time I can replace at least one with a suitable Crayford ( about $250 ) .
They served the purpose for me to get over the boy hood fantasy of owning a large refractor...I got off cheaply
