Hi, I just ordered a new T420! I'd like to purchase an SSD for it to run the OS and apps and make the drive it ships with my secondary drive. Something between 64-120GB will probably be sufficient. My question is what SSD drive should I buy so that: a. It's compatible with my T420 (duh) b. It doesn't void my Thinkpad warranty (I upgraded to 3 years) c. It's reliable d. It's easy to install Also, do I need to purchase any other adapters to install it? I don't need the DVD drive so I don't mind replacing it with a hard drive. Thanks in advance!