There are going to be some differences in opinion here.
First, while a DSLR can take good planetary and lunar images you'll do much better with a dedicated astro camera that can record high-frame-rate, streaming video in a RAW format. Plus, as has been mentioned earlier these types of cameras are NOT very expensive and are well within the OP's stated budget.
So, once you've advanced to using a dedicated astro camera (or dedicated planetary camera) note the following:
If you need or want higher magnifications use a barlow and not eyepiece projection. While the latter will work that form of imaging is rarely used by advanced planetary imagers.
Also, don't focus using a Bahtinov mask since with a dedicated astro camera you can focus in realtime directly on the moon or planet itself.
As for cameras, there are lots to choose from and practically all of them will give excellent images. That said, I wouldn't advise getting the ASI183 (Sony IMX183) for the OP's Celestron Evolution 6. Reason being I'm not really sure that scope would adequately cover the full field of the IMX183 sensor. It will illuminate the full field, but the performance off axis with that large of a sensor would likely be compromised and you don't want to try to use a field flattener, reducers/flattener, or coma corrector with any scope when doing planetary work (the fewer lenses the better). Plus, barlows will sometimes struggle to cover even medium sized sensors.
Given the above, you'll probably want to stay with one of the smaller and more "traditional" planetary cameras in the HD range of pixel count. One camera that hasn't yet been mentioned is the IMX178, which is basically a smaller format version of the IMX183 (and less expensive too). But, there are three or four other CMOS cameras that you can get right now that would be equally as good and those have (I think) already been mentioned.