I have 803 Nautilus for quite some time now, upgrading to the D verions with the Diamond Tweeter should be better for sure, but it will come at a cost. I've found the B&W sound to be warm and netrual and not bright sounding. They are very detail with alot of music seperation with enough bass that I dont need a subwoofer. Given these were made in 1996, the speakers still sound so great and could be had for less than $3K, the D versions will cost double, and the newer D3 or D4 will cost as much to do a paver driveway. Demo and let your ears be the judge.