Okay so I have an Intel 320 160 GB SSD, which is pretty fast but is only SATA II. My computer is an i7 Sandy Bridge with 8 GB RAM and supports SATA III. Is it worth upgrading to a newer drive, maybe the Samsung 840 Pro. Will I notice a big improvement besides read/write speeds? I am more concerned about boot time, responsiveness, and how fast applications load. Currently running Windows 8.1.