Can I have a information about which computer do you buy?
If you buy beyond core 2 Deo then you can put Vista Operating System If not your computer is only dual core you can put Windows 7 and If your computer is P4 then Window Xp will be the best.
If you are rather computer savvy and familiar with it, Linux is good stuff.
Win-8 will (probably!) be out later this year. The 1st BETA release is scheduled for next week, and a Release Candidate set for release in a few months.
So far, I don't like it.
It seems like they are going for Vista-II