Mark
I know this is a bit more 'bungalow' style than your place will be but this is to show white built in's in the bedroom. Wall color, bedding, other furniture add color and interest. This cabinet is like architecture and I feel in the dark wood will be overpowering and not as great for resale. OK off my high horse :)
Robern makes the best medicine cabinets IMO - fully customizable, electric on inside or not, lighting or not. Very clean and well built. Many sizes to choose from. We can look at Lee / Ferg
Another option for guest bath.
Something like this would work for the guest if you don’t want to spend a lot of time sourcing a top and sink with the cabinet guy.
Spec information on master bath sink option
tp ring on cabinet....placement of towel ring is good, your mirror up yet?
Q