I've always used Masonite solid core and hollow, so have no experience with other brands. We used to pick them up directly from their factory in town.

We used JeldWen Cambridge solid core interior doors for our remodel. They are fine.

Anything Simpson is a fine door but they do not actually prehang the door. The distributor does that part.

Where are you located? There are usually distributors or manufacturers in your area that you can order from. For instance, we have Cox Interiors in the southeast. It's based near me in Kentucky but it services 7 states. I would find a millwork factory/store in your area and ask them whose lines they carry.

Thank You to everyone for your suggestions and personal experience with interior doors, I very much appreciate it!!