X200 won't be able to run Qubes.
Anyway, your general and perfectionist approach will make you fail for both technical and psychological reasons.
What you need to do first is develop concrete threat models, and a hierarchy of priorities. I assume that in your case you should probably concentrate more on software than hardware, and specifically on networking, which also splits into many different low to high level tiers, anything from your machine connecting to anything else to what you do on which website.
Using Tor only, as well as modifying and limiting use of the Internet in the first place, will for most people bring more benefits than all other measures combined.