website change

My current website is build with Joomla I'd like to convert it to a Wordpress site because I can make changes and add to it easier than I can with Joomla so my questions are. Just for the record I'm on page 1 for my area be it google + or my pages are showing up as well.
If I change to Wordpress and keep my information i.e. titles, keywords, descriptions and such the along the same lines will I be able to stay where I am with google search?
Any recommendations on a good SEO theme to build on?
Thanks for any help.