kingston hyperx 3k 120gb vs samsung 840 120gb. I was leaning oward the samsung because at most sites it is cheaper and reviews say it is faster but i heard the the kngston will last longer...i really don't know.
Last longer: 9.5 years vs 10 years
Faster: 500x vs 510x over a HDD
(not scientific results)
I doubt you'd notice a difference either way.