I am considering upgrade my 2009 13" MBP by adding a SSD as a system drive (replace the optical drive) and use existing Seagate Momentux XT 500GB as storage drive. My MBP only support SATA II and it seems mid-2009 MBP has compatibility issues with third party HDD/SSD, so some have to downgrade EFI firmware from 1.7 to 1.6 (SATA I 1.5Gb/s). I am wondering if anyone has suggestion on which SSD to get. I think 120/128G SSD should be enough for me. Do I need latest drive (e.g. Samsung 830, Intel 520, Crucial M4, OCZ Vertex 4)? I will probably use my MBP for another 2-3 years before getting a new computer. Thanks.