I have a cabinet already should fit there, so did think about that already...maybe I am just having a hard time picturing it. We are designing a 'contemporary' house, so I would say it is fairly modern with touches of older/more vintage pieces. I will take a picture of my cabinet tonight to see what you guys think. But I guess most photos/when I think of buffet cabinet I picture more traditional pieces. If anyone has a more modern take would be great!

If you are looking to keep the "period" look, then I say no. My place is from 1916 & had a gross 1980's reno. I ripped out all the ugly vinyl floor & cheap Sears sink & went with a black hex floor, white subway, dark grey grout on both. Toilet & tub were original, but I got an old "Standard" wall mount sink with chrome legs & towel bars & an antique medicine chest, light fixtures & glass shelving & towel bar off Ebay. My total job...about $5k. Help my tile guy is my neighbor, but those 10, 15, 20k bathrooms were out of the question.

I think it is outdated too.. But some people love the strip. I just planned my showers and had no strips. Instead I did a tile change half up the wall (tile chair rail between) and in my master did this picture frame look (pic below)

I am facing the same thing !! In the same spot Your ideas sound fab. I was going to put a door on mine as I don't have pretty books like you have though. But indent the bifold door 300 in, and make it 600 wide as the hole is 900 then have shelves on one side for some treasures I will start to collect cos I have a place now for them. Do you love the arch or are you going to square it off? Do you love the small one on the left? If not...make it a square niche and modernise them / it, as I'm not a big fan but you may love them. What you propose sounds perfect. The dark colour, nice too..or moody wallpaper on the back wall before putting up the shelves.