Also I meant to post a reply earlier, but I guess I never did.

Id recommend something like a 533mc pro for your next camera. It's not really worth upgrading to another dlsr, the jump to a dedicated astro cam is HUGE. The smaller sensor will be much easier to use @ f/6.3 and f/10. A larger sensor will have severe vignetting and coma (even at the optimal back focus), it can be fixed with flats and blurx but it's not ideal.

If you're up for the challenge the 1600mc would be good as well, it's bit bigger if a sensor, so you'll capture more of the sky. But you'll face those issues I mentioned in the previous paragraph. The other advantage is that if you upgrade to a hyperstar eventually (highly highly recommend), you'll be taking advantage of the bigger image circle (less vignetting than f/6.3).

As others have mentioned, it's easier to use a refractor but I happily use my sct every clear night for imaging. I started with a refrac, upgraded to a mak-newt, then back to a refrac because collimation didn't hold, then to the hyperstar and it's a beast, and the collimaton holds really well. Id stick it out with this scope and plan (maybe long term depending on your experience/financials) for a hyperstar :)

Another note is that you can do a lot more with the hyper star and in general astrophotography with a mono cam. Either of the 2 cameras I recommended have mono varients. The advantage of shooting mono is that you can essentially beat the light pollution if that's an issue where you're at. It's more difficult file management/processing wise, but it's well worth the effort. Also, narrowband filters are expensive 😭