I think most people are betting on DC. Probably the most stupid business decision you could possibly make. I’ll even go and predict the building to be purchased....the Newseum (halfway between the White House and Congress).
Rumour has it here in sterling va. Specific site. https://www.bizjournals.com/washington/breaking_ground/2015/09/from-quarry-to-edge-city-loudoun-board-approves.html