Do you have a 500i? The Krell and Dynaudio are excellent together. Unfortunately, I've not heard B&W with Krell. I wish I had so I could see if my opinion of them holds true. I personally prefer Dynaudio to B&W by a long shot.

If you do have a 500i you should check with Krell to see if it was included in a recent recall. I found out mine was. Something about the wrong or inferior fuses used on the rails. This could cause damage or fire if the circumstances was right. I've used mine for years without any problem but when I get the kit from Krell I will definitely make the change.