I'll take Concept #4, sticking with a proven concept that works in the commercial offshore marine industry. There is no substitution for displacement......
The stern of No.1 with the front end and hull of No.2 please. Still want to see a fast X-Bow yacht, rather than a tender.
Hmm, someone is looking into my head. I really should draw that yacht/shadow/baseship/thingmabob idea one of those days. Unfortunately the latest greatest feature/unique selling point has the distinctive air of "Nope, that totally does not work in real life." around it... I think a concept should at least look like it could work. Ulstein has a kind of yacht design with their Discovery concept. I distinctly remember one version that was more yachty.