change and update Wordpress theme

we have a Wordpress blog for technology news [magazine] and we would like to have a profissional amazing and simple looking theme for our blog. the blog theme must uses {RTL} as it's in Arabic. link for the site: [login to view URL] we would like to have a many features for the new next theme, like for example custom shortcodes. Please provide me best of your theme that you create or edited, and I will pick up one. Thanks!