Should i keep my N802 or upgrade to N803D

I wouldn't ...

I worked for a B&W dealer for years and got to hear the products come and go. We always had to tout our products however the diamond tweeter is was the single largest upgrade that I have heard. It maybe the biggest upgrade in any speaker I have ever heard.

My 2 cents.

thanks for the input. I have heard the same from others that the diamond tweeter takes the listening experiece to a new level. My understanding is the N803D out performs the previous N802 for both in base response as well. I will try listening to them with my RB1090 to confirm. I have been very happy with the RB1090 amp with my 802's. Thanks for your help and input. I do appreciate it.
Can I ask what speaker cables you would suggest for this set up?

Thanks

Keep the N802's. The 803 lacks the sophisticated bass cabinet and midrange enclosure of the 802. The diamond tweeter may be an improvement but the remainder of the speaker would be a big step down. Remember that most of the music lies in the midrange.

Maybe try another flavor of amp instead. Have you tried spiking the 802's? That changes the character quite a bit as well.

I had both the 803D and 802D and neither one was that good. However the new Diamond series is MUCH MUCH better.If I were you I would keep your speakers and save for the latest series. In my opinion your speakers are better than the D series.