Well, the integration with Cubase is up in the air right now … nobody knows if, how and when that is going to happen, and in what form.
So while Cubase is a very capable program, if you are specifically hoping for some kind of integration between Dorico and Cubase, that is pretty tentative at this point.
If you ask in any music forum “what is the best DAW?”, you’ll get answers that are all over the place … and all too often the discussion tends to get out of hand as people can get pretty opinionated.
Best thing to do really is to download demos, and see which you like best in terms of features, pricing, support, any specific strengths / weaknesses. I personally use Reaper (as well as Pro Tools for audio post production) – it’s very powerful and easy to download and install (takes seconds – with Pro Tools you can spend hours and hours downloading and installing, with errors etc.), inexpensive, and it can handle any audio / midi / video files, including relatively simple video editing; it even has a built in notation editor, although that is nowhere near the level of Dorico or Sibelius. But for many users it is useful. And the community support is fantastic, very lively user base.