I am wondering if there is a camcorder/video camera out there with a touchscreen viewfinder that is detachable and can be used remotely via a cable.

I want to be able to control all features of the camera by this screen (zoom, focus, start recording, etc). Additionally a live view of what the camera is recording is needed.

I know that many DSLRs/Video can be controlled by smartphone/tablet but the features are limited and lag is a problem. I do not want wireless for this reason.

Does anybody know a camera that does this?

I am not a professional so the price range has to be around £600-£1000 ($1019-$1700).

Thanks