Both the PS5 Digital Edition and PS5 are good options, so it'll depend entirely upon your tastes. If you plan to purchase all of your PS5 games from the PlayStation Store, then it may be worth saving money and space with the PS5 Digital Edition. However, it's worth keeping in mind that you'll never be able to purchase and play physical games on the PS5 Digital Edition, including any retail titles you may have purchased for the PS4.
The standard PS5, meanwhile, will give you a bit more flexibility, allowing you to use a combination of physical and digital media. If you own any retail PS4 games then you'll be able to play these, although both consoles will support backwards compatible games purchased on the PlayStation Store.