New O gauge high wall layout

[FiveFlat]

Okay guys, so here's a pic of the plan. I think it would be really neat to cut out a tunnel that goes into the office and back out the other side.
But I'm not sure what would look better, a short tunnel through the corner of the office, or have it enter above the hallway and go all the way through the office and come back out along that 14' wall.

This is where I would like all your expert suggestions.

I downloaded XtrkCaD, but found it far too difficult to plan with, so I used Paint to draw this.
Let me know what you all think...

Thanks,
Sheldon

 

[FiveFlat]

Well, it turns out the wife doesn't like the idea of any layout other than this high wall layout for the den. So it looks like I'll have to use my 6'x8' area in the garage for my HO layout.
Anyway - here's what I think I'll be doing for the den.