Another point to bear in mind, for the same aperture you will need a more robust mounting for a long tube telescope than for a short tube telescope. Telescope mountings are often overlooked and I agree with David’s comments. A good mounting makes a huge difference to usability and enjoyment of a telescope.
I am not trying to put you off a refractor, as a good refractor is a joy to use. However, the long distance from the eyepiece to the mount will multiply up any small movements in the mount and tripod.