With the prospect of the final entry in the 'Harry Potter' franchise taking everyone away from their living rooms this week, the home entertainment studios are finishing out the month with less than stellar product. (Or is it that the first part of this year -- from which the home video debuts have been culled -- was less than stellar in the movie theaters? Perhaps a little of both?) Still, rising to the top this week is 'Limitless,' which actually turns out to be a gripping, involving thriller that allows Bradley Cooper to show his acting chops. But juxtapose that with 'Take Me Home Tonight,' a rote way-back-machine comedy that takes place in the late 1980s with aimless youth facing off against Wall Street yuppies seeking the one thing everyone looks for, no matter the decade -- sex (actually, love).