Need to Change the Site

I am starting to dislike postnuke. For those of you unfimilar with post nuke, post nuke is essentially a content management system that I use to run my website. Recently I have notice that it seems to be insecure. Nuke is lacking in certain features that I would like for my blog; namely easy to use linking, XML-RPC syndication that works. If any of you out there have suggestions for what to use for blogging just leave a comment.