Just what you need, two more vices.
Those are nice, be a pleasure to use. I have a 4x8 table at normal height, about 33 or 34 inches since I'm short and wanted to be able to lean over to reach things without laying on them. Then the work bench I built is about 10 inches higher so I don't have to lean over to say assemble a carburetor or something.
You're tall so my set up wouldn't work for you, but you can tailor your stuff to what's comfortable. There's no reason you have to suffer for your art.