OT - Imac Hard drive Almost not replaciable

Hi All--

I was going to buy a new Imac tomorrow but then a read this from OWC -
Its likely a deal breaker for me - OucH
Looks like to replace a HD in a 2011 Imac you HAVE to take it to apple and use
Apple oem drives because of a temp sincere and firmware available only from apple -
below is a link to the page

OWC Imac page

They are replaceable. However would you rate your skills against a certified technician? If you have Applecare, then you have no worries. You are letting an overblown report by OWC influence your purchase decisions? Did you fancy having a crack at it? Didn't think so.
Replaceable 1
Replaceable 2
Replaceable 3

I did not say the HDs are not replaceable-
The reason I posted this is so others would know about the HD issue
Apple care Only lasts 3 years at most so it is almost certain that a Imac will have
to go back to apple to be replaced the HD and because of the having to OEM drives
its bound to be Expensive- and Yes I the technical ability and tools to change the drive Myself -
Thanks for asking --