I just preordered 2 iPhone 3Gs's (my first venture into smart phone land). I have historically carried a RAZR in a belt holster either on the belt or in my front pocket (occasionally with keys, money, etc). I am seeking out experiences/opinions on protecting my phones. Specifically: 1) If the phone go naked in pocket, how scratchable are they? 2) Screen protector or no? 3) Are there cases you LOVE or absolutely HATE (and why)? There is a plethora of cases out there. Please help me narrow down so I can then go check out the final candidates, hands-on. Thank you so very much!