I note you ask about both of the common sizes. My experience of this is that if you intend to use the camera for fieldwork then its portability is a crucial factor. Most 4x5 kit is relatively easy to carry and the lenses and associated kit are also lighter.
After using a Wista 4x5 and a Deardorff 10x8 (heavy!) I decided I wanted a bigger format than 4x5 but not the weight or bulk of the 10x8.
The Deardorff has a WP back, so I started using this format and fell in love with it.
The answer for me is a Chamonix whole plate (6.5 x 8.5).
It is beautifully made and light and I have got some great pictures with it.
I have no difficulty working with the screw mounted front standard or the lack of stops - this is a personal decision.
Whatever you decide, it's the weight of the associated lenses, film holders, tripod etc which tip the balance.