Design Board: Boy's Retro Modern Bedroom

In designing our new house, I've been working on design boards for our boy's bedrooms.  My youngest, E, wants a red bedroom.  If you've ever painted something red, then you know how HARD it is to 1. pick a red and 2. paint red.  In my current laundry room, I painted one side of the laundry room door to the garage red.  It took 7, seriously SEVEN coats of red paint before the white didn't show through the red.  HARD HARD HARD (and pretty annoying).

So, when planning for a red room, I worked on using the least amount of red paint possible but creating a red impact.  Take a look:

I love gray right now, who doesn't?  So I am planning on painting the room a two-tone gray, then white and red stripes (most likely only on 1 wall).  The chevron curtains are a whimsical touch along with the bulldog lamp I probably will spray paint red.  I would love to find a vintage 1950s dresser like the one shown, but can settle on the JCP version.  I love the ledge bookshelves that I will make and then adding a touch of the gospel to his room is important to me.

So, what do you think?  Is it appropriate for a 4 1/2 year old boy or too old or too girly?  What pieces would you change?