If you don't mind a tablet-style detachable keyboard, Asus' Zenbook Duo (UX8406) is a sensational and surprisingly affordable mix of laptop convenience and desktop dual-monitor productivity.
Given the price, it should have extras like a volume knob or USB pass-through, but Kensington's imposing, quiet MK7500F mechanical keyboard will thrill discriminating typists and frequent conference callers.
As mechanical keyboards move from the enthusiast elite to the mainstream, Monokei's Standard is too good to stay under the radar despite lacking accustomed features like programmable keys or a USB wireless receiver.
If you travel with a notebook plus a portable monitor for dual-display productivity, you're suddenly in the Stone Age. Lenovo's double-OLED Yoga Book 9i may have a few rough edges, but it's the first successful twin-screen laptop.