Indeed, try before you buy - but I have a Met Stradivarious and find the micro-adjustment for fit excellent, and the brow pad good at keeping sweat at bay, if a little more abrasive than my old Giro and Bell helmets. I just have to make sure I slacken the fit off a fraction as my hair re-grows!
Also, if you wear glasses when cycling take them along too. I had to modify my Bell as the brow had a small peak that dipped down and interfered with my Oakleys when riding. Luckily it was relativley easy to remove a small amount of polystyrene to prevent interference.