Speaker upgrade recomendations

Hi all.  

My Den is 15x15 with 8 foot ceilings.  I listen to mostly hard rock (Guns N Roses, ACDC etc)  I currently have Wharfedale Denton 85s and Looking to upgrade.  Budget for speakers around $2000 or less.  I currently have a PS Audio Sprout but will be upgrading that as well.  Thanks!