OS2008 is better. You can go back to 2007 if you want, but I think it would be dumb.

Before I go into all the differences between 2007 and 2008, I'd like to get your previous experience. Namely, have you used Windows? Which versions? Would you mind listing the programs you used with each version and the advantages they had in each? What version would you recommend and why?

The lodestone for installing programs in the N8xx series is at http://gronmayer.com/it/