In my opinion, realize PCLinuxOS x86_64, can be a very good chance to have most x64 Processor user can use (and love) PCLinuxOS. A x64 Processor User, normally, like to have a x86_64 "distro" in his own PC...
Personally, for my individual experience (that's not a "law", but it's good for me), PClinuxOS 20011 LXDE Edition is the best "distro" I never have seen (the Phoenix Edition is at the second place). A x86_64 version of PCLinuxOS LXDE Edition can be a very good chance to have a lot of new Users.