hi there! i'm switching from pc to mac and i want to by a white macbook. i'm a unversity student and i primarily need the macbook for writing, music, watching movies and series and photoshop(hobby webdesign, not print). i wondered if i should get it right now or wait till merom is out. i heard it may be shipping for holiday season? is this date realisitic? and do i need the merom/is it worth waiting for? thanks!