Should I buy the B&W 804d's or 805d's

Just listened to both of them yesterday and I really liked the 804d's. The 805d's are definately going to need a good subwoofer whereas the 804d's sounded good all by themselves, though a subwoofer wouldn't hurt them either. Also, I felt that even with a subwoofer the 805d's upper bass and lower midranges might still be lacking compared to the 804d's. The 805d's did sound very good for what they are but not nearly as satisfying or enjoyable as the 804d's. Also, cosmetically, I thought the 804d's looked better. I didn't care for the stands on the 805d's which also adds another $700 to the cost. By the time you add the stands and a subwoofer, you're close to the cost of the 804d's. All of this is of course just my opinion. I also listened to some Maggie's that were nice too and alot cheaper. If only they weren't so damn big! Good luck.

What are the prices for this new line?

800 Diamond: $24,000/pair
802 Diamond: $15,000/pair
803 Diamond: $10,000/ pair
804 Diamond: $7,500/pair
805 Diamond: $5,000/pair

What are everyones thoughts on the new 804di vs the older 803d?

I've just purchased a new pr of 804 diamonds. I was considering the 805d and I even had a pair of Sound Anchor 805 stands. After considering that I would require a sub and that the 804d has far better midrange driver I went with the 804d. They are a stunning value, very refined and they really swing with a kind of natural dynamic ease. The new diamond tweeter is just amazing. I previously owned the Dynaudio C1s and I can only say, the new B&Ws will be in my listening room for years to come. I'm REALLY happy with the 804 diamonds. Warning: I found that they are down right flat, boring and 2D until 100 music hrs and of course they will just improve over the next month!