The Gigabyte Ga-7VRXP has been known to have many instability issues and problems, i'd avoid it, there are better choices out there. The 1800+ isn't bad, but for like another $10 or $20 you could probably get a 2000+, nice boost. Everything else is fine. Make sure your power supply will handle the new parts, 300 watts sometimes has a trouble handling AXPs if it's a lower end generic brand.
aha!! it has some kind of cuts, hehehe"
have you ever seen smoke from a seagate?