I am going to be replacing the drive in my 2011 iMac with an SSD. I've narrowed my choices down to either the Samsung 830 or the Crucial M4 (both 256GB). The Samsung is about $40 more than the Crucial. I am not worried about the money unless the M4 is every possible way just as good or better than the Samsung. I had originally planned on the Samsung because Apple uses Samsung SSD's in their computers and I figured that was the best way to go. But then I read depending on which firmware version of the 830 I get I may not get the best performance. Any advice or insight would be appreciated. Thanks.