Actually, it's the same size and weight, isn't it? I won't quibble with the 'uglier' and 'more expensive' appellations, as they are opinion and accurate respectively...how can you not look past these failings, however, when it is the closest you'll come to a desktop [non-SLI, of course] system? Puzzling...
EDIT: Also, the 6800Go DDR3 model you are looking at there is clocked at 330/500, whereas the Dell model is clocked 450/550...jacks up the frames quite a bit, yeah?