From what I have read, the 803d3 is superior to the 802d2.
I doubt that.
I would take the 802D1 over the 803D3 or 803D200 any day.
I am sure almost every single manufacturer would like you to believe that the latest is greatest. I don't blame them. They want to sell speakers. If they said that the D3 sound just like the D2 and D1, people might not want to spend more money. Just like in 3 or 4 years, they will say the D4 is better than the D3.
When I bought the 802D2 at my dealer, they actually had both 802D1 (open box) & 802D2 to audition. Yes, the dealer swears up and down that all the D2 sounded better than all the D1. So I did compare them. And my opinion after 2 different auditions was that they sounded exactly the same. And the speaker measurements confirmed my opinion. The reason I bought the 802D2, instead of 802D1, was because I wanted piano gloss black, not satin red rosewood (or whatever red was). If the 802D1 were piano gloss back and cost $2K less, I would have gotten the D1.
Stereophile measured the 802D1 & 800D2 and the FR's measured almost the same.
http://www.stereophile.com/content/bw-802d-loudspeaker-measurements#ou3y8hoLgWimbu5M.97
http://www.stereophile.com/content/bampw-800-diamond-loudspeaker-measurements#oFYpFJ38cEHWxw4X.97
So when Stereophile measures the 802D3 or 800D3, we will see how much better it is.
However, the key is taking the time and audition on many visits and compare to other speakers. Don't just take people's word for it when they claim that the latest is greatest.
If after you have auditioned many times and the conclusion is still the same - that the D3 is actually better than D2 and D1 - then you won't have any regrets.