You will need a motherboard that can boot to a PCI device (the RevoDrive). Not all motherboards can... PCIe based solid state storage will be faster than a SATA SSD (typically). For comparison...
RevoDrive X2 100GB
Sequential Access - Read:up to 740MB/s
Sequential Access - Write:up to 690MB/s
Power Consumption (Active):8.3W
Power Consumption (Idle):4.3W
OCZ Agility 2 90GB (this is a good SATA SSD)
Sequential Access - Read:up to 285MB/s
Sequential Access - Write:up to 275MB/s
Power Consumption (Active):2W
Power Consumption (Idle):0.5W
You will need to reinstall your OS on the new drive and move any files manually.
Be sure you are buying the RevoDrive X2 instead of the original (non X2) for better speeds.