not sure about the clean up, you can just re einstal JAG and it will overite all your old OS information.
As far as the ram goes, Crucial is just fine for it. It is not the fastest ram out there, but it is on par with OEM Ram. It also has a lifetime warranty. You don't really need the Kingston, or Corsair, or PNY. Crucial is a very reputable company, and they make eccelent ram. Hell my first windows computer still has some Crucial ram in it from years ago and it still works fine.
Plus the Crucial will only be about 25-30 bucks, if that.