Frankly the best design out there goes to the Nokia N97, no bar, hands down. They just need to reinforce the tilt mechanism (use a thin but strong Adamantium hinge) and make sure its a sturdy body (eg HTC Legend) so that you don't need to use a case and make it fatter. Now just slap that on a 4.8in screen that has little/no bezel.... and make it slim (12.5mm or thinner) and you've got yourself the makings of a champion.