Glad to see the build is coming along.
In regards to your monitor setup/plan: Have you heard of a company named SimPit? (In my first post link the guy over on ISRTV is using these) Looks pricing is up there and the name of the thread says "Budget"but may be a good idea to have a look on their site for ideas or maybe even contact them on all the 180 view angle questions.
Man would i love to have their 270 view angle setup.