I own a Sinar P (4x5). It's a dream to use. It's got geared movements and is way faster to set up than any wooden field camera. I bought mine for portraiture and when it's mounted on my big A100 Ries tripod, it stays there. If I accidently bump it while posing my subject it is far less likely to move than a lighter camera/tripod set-up. All movements are straight forward with nothing fussy.
With the Sinar you also have the choice of buying a Sinar Shutter so you can use lenses in DB mounts and not have to leave the back of the camera. You can set the shutter speed from the rear of the camera and when you insert the film holder it cocks the shutter. You can also use those old brass barrel lenses which are so popular and have a built in shutter. I don't own the Sinar shutter myself but I played with one once. They are not cheap.
The weight advantage of the camera is also it's downside. You won't want to carry it too far from your automobile. It's also too bulky for backpacking although there are a few brave souls who do.
If you have your heart set on 8x10, you owe it to yourself to try it. I much prefer shooting 8x10 over 4x5 just for the experience. Just looking at that big ground glass makes it all worth while.