Available from Northern Optics the Skywatcher Skyhawk 1145PS AZ-GTE is a sensible starter GOTO scope due to ease of use, and the wide field of view the short 500mm f4.4 OTA offers. Magnifications of 20x and 50x included are ideal for wide views of the Moon and rich star field clusters + comets.
Many lower end Newtonian’s come with a built in barlow lens inside the focuser. These end up reducing the overall quality of the image, and in my opinion defeats the object of the short focal length.
Although the OTA (optical tube assembly) is a relatively long lived design, it is still a popular choice, with 4.5 inches a nice compromise between budget and the larger 6-8″ scopes if budget does not allow