I just bought a new computer and I had to make the decission between 32 and 64 bit. The 64 bit is newer and they say a lil faster. Plus it can hold more Ram. 64 bit is also gonna add at least a hundred bucks to the price. I decided to go with the 32 bit model. Its what I had before and I know my programs will work with it. 3 gigs of Ram and 32 bit Vista is enough for the average user. If you are an extreme gamer or a graphics artist or something or if money is not an object ... go with the 64. Its my guess that most programs will work with either, or soon will. Its the Operating System thats 64 bit....not the computer. I hear that the new Windows 7 is gonna be 64 bit.