I have a MacBook Pro Mid 2010 (MacBookPro 6,2) with a SATA 3 Interface and I would like to replace my HDD with a SSD. Googling a bit I found these SSDs as possible candidates for my MacBook Pro: - V4 by Crucial with SATA 2 Interface (3Gb/s), Model CT256V4SSD2 - Samsung 830 Series with SATA 3 Interface (3Gb/s), Model MZ-7PC256B/WW - 240GB Mercury Electra 3G SSD by OWC What do you think about? The Samsung drive is only 7mm instead of the usual 9.5mm of the other ones. Do I need to use a spacer for it? Furthermore, from Samsung site I see there are two versions available. The one with the laptop kit (MZ-7PC256N) and the one without it (MZ-7PC256B). Are these versions the same or not? Within Amazon site I see that the former has been published in 2011 while the latter in 2012. Thank you in advance.