When the next MBP comes out, do people think that the prices will stay along the same lines as they are now, or increase significantly? If increase, by how much typically? Will the current unibodys still be available at the Mac Store? Will the prices go down, and if so by how much? Need a new laptop now, and seeing if I should wait for a better price on current line, or if I should get the newest if there is not a huge price jump.