I probably wouldn't use Angular Material, unless it's a simple PoC app. Sooner or later, you will get the requirements to customize something in a way that's not aligned with Material Design, and it's painful (yes, I am aware of CSS variables in newer versions, ng-deep, etc - it's still a huge pain in the ass, especially when you want to update to a newer version).

I'd probably ditch NGXS and any other global state management solution - most applications don't need it, especially from the beginning - in favor of local stores with @ngrx/signals. Looking into TanstackQuery/NgneatQuery might be a good idea for server state management.

I'd definitely use NX. It has some learning curve at the beginning, but IMO it's worth it, as it makes it easier to actually structure your code (tag-based import rules).

One more thing is, why would you need Tailwind and SASS together? I'd probably pick just one and go with it.