I think in your situation you would want to lean towards the agility 4. The extra storage and cheaper price are nice. However, the hyper x is a bit faster (more noticeable during large file transfers) and significantly more reliable. The agility 4 is no longer being manufactured which means it is of an older, less reliable SSD generation which scares me a bit. Either way you should be fine, but I would be aware of the reliability issues of the agility 4.