I'd suspect Tourneau at Pentagon City Mall in Arlington would have them but same driving time more or less. But Joma Shop is a solid and reputable online retailer for new (and I think pre-owned) Swiss timepieces.
From what I understand Jomashop is a grey market dealer and Isn't an Authorized dealer of Omega, which can cause some manufacturer warranty issues. Looks like they provide their own warrant. I'll have to do some more research to see if any price difference is worth it.