I auditioned the BL3's and BL4's today. The 4's were a huge disappointment. They sounded like if you place a speaker behind something. The clarity was.. there wasn't clarity at all. They remind me of a pair of Logitechs I used with a PC couple of years ago. Terrible.
The BL3's, on the other hand, was definetly something to crave for! They reproduced just enough bass to be proper stand alones. For my 3rd Sonos zone they're perfect. Distinctive and defined.
I was offered a pair of demo-used speakers, and I really have to think about it till next tuesday. Don't get me wrong; I don't have to think about which one to buy, I just need to count some cash :)
BeoVox 5000 - BL 8000 - Sonos ZP100 & ZP80. I think I'm craving for the BL3's and another ZP80!