Given that they're each 53" by 21" (20" for the doors on the right side), what wood should I use to ensure enough strength and stability. These doors will be muntined with 8 lites each. I'm thinking that the lites will actually help prevent racking if they're properly fit. I was planning on using 7/8" thick by 2" wide for all rails and stiles.
This entire unit will be painted so appearance of the wood isn't an issue. Still want to avoid the large pore structures, though (ie, ash, oak, etc...)
Do you think poplar would be strong/stable enough? Any other design/construction input?