Newtonian systems produce off axis coma. The standard parabolic mirrors require relatively expensive 3 or 4 element coma correctors to get rid of it without introducing a degree of spherical aberration. Hyperbolic mirrors can be pretty well corrected with 2 element coma correctors, but the main mirrors seem to be more expensive to make.
The results are basically the same for both and the extra glass of a properly made corrector should be no concern.
Explained in
http://www.telescope-optics.net/sub_..._corrector.htm
agree with Wavytone that the Maksutov corrected spherical Newtonian systems are a good choice.