TERMINUS 100 may not be quite finished yet, but when its completed in the spring, the 26-story glass-and-steel high-rise will bring a Fifth Avenue vibe to the intersection of Peachtree and Piedmont roads. The Buckhead tower, designed by Duda/Paine Architects of Durham, N.C., is the first of five planned by Cousins Properties on the 10-acre site. It will be anchored by two floors of retail space set up against the sidewalk, with a glitzy, Vegas-style restaurant plaza around the side. A stunning example of Atlantas mixed-use building renaissance, Terminus 100 is certain to bring a new jolt of energy to a rapidly changing part of town. The high-profile address and highfalutin architecture already has roped in a high-profile tenant: Cousins itself plans to move from the suburbs into the Buckhead building. Thats certainly making a statement.