I've been using Libreoffice but only because it seemed to be getting a little more attention, updates, than OpenOffice. A few Linux distros seemed to have made the switch too. That led me to give it a shot.
I don't use any of the features in depth enough to give much of a comparison. Both allow me to write documents and make simple spreadsheets when needed and save in formats compatible with others. You may have greater needs for business and such.
Have you tried Google Docs? Good? Bad?
Best of luck clearing out the 'extras' from your new laptop.
Matt