Design Suggestions Needed for a Dramatic Powder Room

I love dramatic powder rooms.  I mean, I really, really LOVE dramatic powder rooms!  Rooms that are full of large scale wallpaper or painted an over-the-top color with accessories to compliment, maybe lots of sparkling mosaic tile or a gorgeous over sized mirror - all those things make me love itty-bitty powder rooms with mega impact the moment you open the door.  One of the reasons I love to attend the Parade of Homes is to be "wowed" by the powder rooms.  Though this year was dismally disappointing, I have been thrilled in the past with the variety of wow-factor out there.  I knew from the start our little powder room needed to be one of those stand-out never-to-be-forgotten kind of rooms and I knew exactly what colors I wanted it to be - pink, black, white and silver.  It all flows from the wallpaper I saw once and absolutely loved - Graham and Brown's Elizabeth in Pink & Silver.  I ordered a sample of it and just received it earlier this week - it is way more beautiful in person than the little 1"x1" picture I cut out of a magazine years ago and kept all this time.  So, I now know exactly which wallpaper will adorn that room, I have the vessel sink, I think I know which mirror and faucet I want and I have the light fixture.  What I am not sure of is if I should paper the entire room (not my first choice) or just paper the wall opposite the door and paint the rest of the room a complimentary color (my first choice) or use bead board on the bottom half of the wall and wallpaper the top half all around (my second choice but causes tiling issues around the vanity).  To help you visualize the space, I have included the floor plan of the room - really, your typical powder room. 

Then, to help myself picture the room, I made up my own little "inspiration boards" in Photoshop.  One has pink walls and one has silver walls (since, though it is hard to see, the wallpaper is actually pink and silver, not pink and white.  And it is flocked.  Gorgeous!).  I know that with such a dramatic wallpaper, it is important to have some calming elements in the room so I intend to have a lot of white - white floor tiles, white trim and door, white vanity and vessel sink, white toilet, and white 4"x4" tile for the back splash.  I know the light fixture will be black and will give lots of light so it shouldn't be dark in the room.  I "think" this will be the mirror I get but since I don't have it yet, that could change.  You never know, I might find a huge silver ornate thing that is swoon-worthy - then I would do that instead!  Any suggestions on paint color?  Any suggestions on how much wallpaper to use?  I am not asking you to tell me to not use the wallpaper or to use another kind because I am most certainly using this wallpaper in this room.  If you don't like it, that is okay, you can use another bathroom if you are coming over or just ignore this post if you never make it to my house!  What I am asking is for you design divas to bring out your best design savvy and give me some direction or confirmation as to what would look best in this over-the-top glitz and glamour powder room!

Edited to add:

One reader suggested using wainscot on the lower half of the walls so I did some browsing online to get an idea of how that might look and I really like it.  So, I quickly made an "inspiration board" to include the wallpaper and wainscot option.