I am confused on the Vista O.S.   I am going to get the XPS 420 , Quad Q6600. If I order the Home Premium version is that  64bit or 32bit or both? Is the 64bit even something that I should be considering at this time. I am reading on the forums about allot of problems and little support for the 64bit version. I want to be able to play the new video games at the highest levels and will this version help me? It seems to me, that 64bit is going to be the future to try to keep up with the technology at all. I am also getting 4gbs of memory and I hear that it will not  recognize that much.Any input or suggestions would be appreciated. Thank You.