For those looking to upgrade their M14x with a SSD, I added the Intel 320 series 120GB without any problems so far. Picked it up at Newegg... http://www.newegg.com/Product/Product.aspx?Item=N82E16820167050
I've got the same Intel 320 SSD in my M17x. I can't utilize SATA III speeds in my R2 so the 320 seemed like the pick of the SATA II drives, with great performance and reliability and also reasonably cheap. Like yours OverRide, mine has been perfect so far.