Amp for Harbeth P3ESR and Cambridge Audio Azur 851N

I’m using WyWires for the speakers, but haven’t tried others. Yes, the A21se is a rare bird on the used market. I found mine by posting a wanted ad on a different audio website. Good luck. 

Hi All,
Anyone tried the following combination. Would like to make my decision today. I am in Dallas and that makes it so difficult to audition any of this option.

Option 1:
Harbeth P3ESR
All-in-one: Naim Uniti Atom (New unit @ $3200)

Option 2:
Harbeth P3ESR
Source: Cambridge Audio CXN V2 (new unit $850) or Azur 851N ( used unit $1,250)
Amplifier: Sugden A21SE Signature (stall demo unit, $2650)

- Which option do you think is better from audio perspective? Any of you have tried either of this options?
- Option 2 is about $600 more with a lot of used components. But seems Sugden is well regarded by many as the best SS integrated amplifier in this cost range. Is this worth the extra spent in your opinion?

I am going to put this in a small living room. And I listen to a lot of slow rock, classical music and R&B vocal and Jazz.

I have the Harbeth P3ESR and the Naim Uniti Atom and I'm quite happy with that combination. 

I have gone with option 1. Which is Naim uniti Atom + Harbeth P3ESR. I felt the sound is a little thin to my liking. It lacks lushness, power and details. I want to add amp between the uniti Atom and Harbeth.

Any recommendation?

BTW, I moved the setup to my bedroom. The sound does improved due to smaller enclosed place compared to living room. This is expected. But still something is lacking....