The Crucial RealSSD 300 is the same machine, and probably slightly cheaper than the Micron.
Before purchasing, check the SATA3 card you have, if it's not connected to a PCIe x16 socket, don't expect full speed from that SSD.
In other words, if its PCIe x1 card, don't expect full speed. The better SATA3 solutions use a PCIe x4 connector, but these should be fitted to a PCIe x16 socket, connected directly to the North Bridge, or Core i5 750, Core i7 860/870 if you have a P55 chipset.
I'm not sure what the configuration would be if you have AMD.