Yes dual band and 'N' router as I mentioned.
The signal strength is excellent (max bars).
The distance from the router to the farthest computer (Win 7) is 30 feet, and the signal has to go through 3 walls (drywall).
The Vista computer is about 25 feet away and the signal has to go through 4 walls (drywall) and one wood desk, and one door.
I am very satisfied with Linksys and decline to comment on DLink. I even bought two Linksys wireless USB Adapters. Both working well.