Hi Gang, I am contemplating upgrading my sata-II 180G Vertex2 SSD in my 2011 MacBook Pro (sata3 capable) to either a 256gb Samsung 840 (non-Pro), or a Crucial M4, or a Samsung 840 Pro (if really really worth the price) My sata2 Vertex2 SSD gives me @ 90mbs read/write with BlackMagic DiskTest software. What real-world performance difference will I see by going to a newer Sata3 SSD? Should I buy a 240/256gb Samsung 840 SSD, Crucial M4, or the Samsung 840 Pro? Which is better for reliability/performance, the Crucial M4 or the Samsung 840 (non-Pro)? I like the Crucial M4 because apparently you can upgrade the firmware with a Macbook (and not a Windows machine) Thanks for all your insights, IAN PS: I use my 2011 Macbook Pro for Internet (10 windows open), photo's, email, Parallels Desktop, web design, etc.... PPS: Is there a difference in buying from Amazon vs Newegg in regards to returns/defective drive etc...?