vista ultimate 64bit costs 12k i suppose.
i got one with my HP lappie... and had wanted to buy it. but now... i'll wait for the next windows release.
i also suggest go for XP now. and the next windows...
vista turned out to be something of a pre-release. many snags to be recitified.... performance is ok... in fact gaming i heard is better on XP if u have DX9. DX10...gamin is mayb on apr... only+ is DX10 if ur graphics card supports it and ur proccy can take the heat of action.
between 64bit & 32 bit.. i would prefer 64bit. dunno why... but i had fewer virus attack with the vista 64 bit... as compared to regular xp 32bit. mayb because most viruses r made for 32 bit oses.
however i can safely say that 64bit vista can run 32bit software due to a certain
WOW64 emulator in vista; but not most 32 bit drivers though.