The 7710 I purchased through Amazon works like a champ.  I have numbers of the lighter commercial laptops from Dell in my video studio.  Unfortunately, they have been cost cutting and it shows.  Fru-fru colors, no keyboard lighting, fewer ports, etc.  (Who would have silver keytops with pail blue lettering?)I have been watching Amazon for lighted keyboards with black/gray keys and some horsepower.  This one fit the bill at the right price.  Keep up the good work.Just a note.  Thanks.