Amd Processor Wan't 64bit Version Of Vista

I have read this stuff over and over and I have seen it change and I am still trying to figure it out. I have my hardware ready to put together my next "Home Grown PC". It will have a 64 bit dual core AMD card. A ATI Direct 10 compliant graphics card, 512mg and allow me to digitally connect to my 22" wide screen LG monitor. I have 4gbs of RAM (a pair of 2s). Oh yes, a loaded with functionality MSI motherboard that can handle a AMD quad processor if I want. So, I definitely, will want a 64 bit version of Vista. I have reseached and downloaded the 64 bit drivers needed. Some issues still there for my Canon Lide 50 scanner and syncing my Palm PDA. But, I will worry about it later.

I would love to get the Vista Ultimate, but to me, the cost is rather insane. Way to high for me, even though I work and am a student. I am looking at the Business 64 and the Home "Premium" 64. On the differences between them, it appears that the Home Premium version has a limitation of 16gb of RAM memory, while the Business edition has something like 128gb limitation. I have the full Nero Package, but there is backup and restore software with the Business Edition, not in the Home edition ?? The Business Edition does not come included with Windows Media Player and related technologies such as Windows Movie Maker, and a DVD creator as well as some "games". Aren't those games and the Windows multi-media products available for free download ?? Or possibly is it just telling the Business Edition to install them, like you would do now with XP. I am aware that every DVD is exactly the same, regardless of version, but it is the license that is entered that allows the installation to load and not load some features . I also am concerned about communication features that seem to be in Business that are not in Home ?? I know that the SP1 will be coming out shortly, so there might be some additional differences coming down...............