With all of these factors are taken into consideration, Dobsonians are the best option for folks who want a telescope that can take them to the realm of the galaxies, and yet be affordable, portable and still have excellent optical and mechanical performance. Below are two drawings I made of the same globular star cluster from a heavily light polluted area. One was made through a 6-inch, the other through my 15-inch.
The top drawing I made with my small 6-inch Dob from a light polluted area at 60X. As you can see, it is unresolved and does not look at all like a globular cluster. From my light polluted front yard, it looks more like a comet, and even at high magnification only a few stars around the edges appear.
This is the same object from my light polluted front yard through the 15-inch telescope at 250X, which fully resolved it into stars and revealed clearly the star like inner core of thousands of stars packed into a region a few light light years across. In both cases I had the glare of thousands of streetlights lighting up the sky all around me. As you can see, a larger telescope does more even from a light polluted area, but it will be of much greater benefit from a dark site than a light polluted one.