Plugin to extend WXR import / export feature

I need a plugin that allows me to export and import my posts with more flexibility. I would like to be able to export posts based on a specific date range(not just by month), by specific category, tag, author etc. I would ideally like to be able to refine my exports to individual posts, but the current wordpress import export features doesn't allow me to do that. Is there any plugin that extends the current wordpress import export feature?