The drive you provided the link to is ATA-8 compliant, which would make it SATA 3. That fits with the claimed max throughput of 759 megabytes per second.
The simplest way to migrate from the existing disk to another would be to use drive cloning software to make an image of the disk, then put that image on the new disk, either creating a partition the same size as the original, or expanding the image to fill the new disk. This can be done over a network, to a DVD-RW drive or to an external disk.
Bear in mind that you end up with an exact replica (block by block) of the original system disk, so if it was full of crap and running slowly, so will the new system.
SD