I have changed the HDD on several models (iMac G5/Intel, MBP SR, MB) and its quite easy to change, just be carful when doing it as with any electronic device.
Why would you ask an Apple Tech to do it for an absurd fee, its easy and can be done quickly, sure the first time is nerve racking however you get over it. People either have too much disposable income or think its brain surgery, and no it my warranty did not get void since I did not break anything while doing the replacement.![]()
As a Mac Genius for Apple, we tend to giggle every time we replace a hard drive. I promise it's not that hard.