Since the vanity is between two walls, I'd purchase a cabinet with appropriate filler to fill the entire space, then have a counter templated. I wouldn't want the vanity floating in the hole between walls. Build it in, like the current one is. You can still have open shelving or legs on the bottom if that's what you like.

I have the same problem with a vanity I bought also: regular liquid hand soap has left stains or discoloration marks on the stone top. Doesn’t anyone know of a way to remove them? It’s very hard to capture them in photos but here are a few.

I disagree. I actually have this set up. Our vanity is too small for 2 sinks without looking silly. Plenty of room to brush your teeth or wash your hands while your spouse is at the sink. Also because the faucets are positioned to the far ends of the sink, when you are standing in front of the faucet, there is plenty of room. Michael - it is very useful. I would know.

I would have a mirror madeso it goes all the way to the ceiling, mirror is fairly inexpensive and it will make the room look much bigger, perhaps do one with a bevel. Or if youre buying a framed one u probably are needing a size of 72x48 minimum (that will put it almost to the ceiling and look great :-) Ds