I did. Trouble was that the speakers were almost new. Nautilus speakers need to 'run in'. I heard deeper, fuller base on the 803s. Anyway I figured that you get what you pay for with B&W so I ante'd up for the 803s. I would have gone for the 802s - they're way better sounding than the 803s but more difficult to live with (the 'better half' said she'd end up speaking to them if she wasn't paying attention). By the way I've got the 803's hooked up via bi-wire cables to Pass Labs X5 power amp and that to the Bryston SP-1 Pre-amp/processor using balanced connections. I use the 'pass through' feature on the pre and so don't use the sub on two channel material and don't miss it with the 803s. I might have with the 804s.
Hope this helps.
Hope this helps.