Have a look at the Skywatcher MN190 f5.3 Mak-Newt, focal length 1000mm.
Easy collimation, holds it for months. It's an astrograph, flat field and no coma thanks to the front corrector. No diffraction spikes, and a small secondary compared to regular newts. Fully baffled tube. Supports camera sensors to APS-C with the original small secondary, and larger formats in the recently released slightly larger secondary model. It resists dew wonderfully, just wrap a heater strap around the front corrector and it stays fog free all night. Great all rounder. Can be used visually, and takes high magnification. Large APO type image at 1/3 the cost.
Focuser is adequate to start with, and Moonlight now has a good adaptor for focuser upgrades.
And 10% off at Andrews this week.