Dell Optiplex SX280

The OptiPlex SX280 has one of the most petite cases of the small systems we tested. Its dimensions--10 inches deep, 10.2 inches tall (when standing on edge), and 3.5 inches wide--enable it to fit into the smallest spaces. Our $1403 review model came with a Dell 1703FP monitor, which includes a stand for mounting the case behind the screen and transforming it into an all-in-one model. (Since our testing Dell has changed monitors for this system; it now provides the 1704FP.)