Advice on upgrade

Dear fedora-kde list, I plan to switch from fedora 8 to fedora 10 in the next few days and I need your advise on a few strategic matters related to kde. Until now, when I upgraded, I usually created a brand new installation, including my user name. I would carefully attribute the same uid and guid as in my previous installation. I would then put my data back in the newly created /home/me and than slowly put back in the /home/me/.kde/ directory the few config files that I need/want (bookmarks, kopete config, kabc data, kwallet...). I really liked the idea to start with a configuration as clean as possible, using the default config. But this time, kde is very different. My question is what do you advise me to do ? Should I just keep my old .kde directory ? Can I copy just the files I really need and hope the kde4 treat them the same way? Thanks, Manoel