I have an 10 inch DOB, had a ETX-125, have a C-5 (among others..)

It only took one trip to a dark sky location with the 125mm MAK to decide to
sell it. With the 1.25 inch eyepieces, the maximum exit pupil is not much more
than 2mm, the field of view is less than 1 degree. Sweeping a dark sky was
very underwhelming as were the DSOs.

Compared to a 10 inch F5 Asian DOB, there is no contest, 2 degree FOVs, bright
targets, galaxies.....

Personally I think the most under-rated DSO scope is the Orion SpaceProbe
130ST, the 130mm F5 Newtonian with a good quality Parabolic mirror. Its about
6 lbs and 24 inches long, its compact and yet provides some nice views, both
widefield and high power. I have taken mine way past the 50X per inch on double
stars, waste magnification to be sure, but round airy disks at 1300X are pretty
neat anyway.

The mirror is small so cooldown is not much of an issue.

I consider this scope to be the half pint brother to the XT-10. The one I have
has a 2 inch focuser, (not standard) and that really opens up the sky for a 5
inch scope. Its Central Obstruction is a bit large at 29% but still smaller
than that of a Mak or SCT.

This scope will do 3+ Degree FOV (with the 2 inch focuser, 2.5 Degree
Otherwise) at 20x with 6.4mm exit pupil.

Pretty hard to be that for doing the Milky Way.

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Don't know why you are asking this question, but for what its worth, there is
not doubt in my mind that a 10 inch DOB will do everything better except fit in
a small car and of course track. But the small exit pupil and small aperture
limit the usefulness of tracking when viewing DSOs.

jon