Take a look at these Silverline Prelude Plus floorstanders. Silverline speakers are very natural and produce 3D imaging and a huge soundstage much like KEF speakers.
http://www.silverlineaudio.com/main/index.php?option=com_content&view=article&id=67:preludeplus&catid=51:prelude-plus&Itemid=69
But, if you have a bigger budget then Boenicke speakers should absolutely be on your radar. They need some room to breathe, but if you can give them that their diminutive size will amaze you with their huge, 3D soundstage.