Suggestions for Harbeth P3ESR speakers


Last year I purchased a used pair of P3ESR speakers in cherry finish for my study. The gentleman from whom I bought the speakers also had a Naim Unitiqute (first version) that he sold to me at a decent price. While I liked the combination, I always felt that the Unitiqute was a little under powered for driving the Harbeths to their full potential. To make matters worse, the digital display (green LCD) on the Unitiqute started to fade and eventually went out after a few months. Searching on the internet revealed that this is a common problem with Naim amps. On one hand, they recommend that the amp be kept on at all times for optimal performance, but on the other hand they use substandard parts for the display. What a shame! So now, while I can still listen to music, I can't really see any information on the amp. Cannot listen to the internet radio, which was a feature I enjoyed, anymore 'cause I can't see the display.

So now, I'm in two minds. Will getting another amp make the Harbeths open up further? Or am I better off selling them and trying something else instead. I already have a pair of KEF LS50 Wireless that I really like and enjoy. KEF has come up with a smaller version (LSX), which is worth a try.

If I decide to stay with the Harbeths, what other amps can you folks recommend? 

Limitations: Have to buy used, under $2000 preferably. Small footprint preferred since it's in my study (10x12x12).

Music: Mostly jazz (including modern), vocals (Diana Krall, Gregory Porter, Nina Simone), soft/psychedelic rock -- Pink Floyd, etc. Sometimes I do listen to hard rock or mainstream pop also. Don't really listen at high volumes mostly but do like to crank it up every now and then.

Lastly, I think adding a small, fast, and musical sub might also help. Recommendations in this category are also welcome
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@yogiboy Thanks for your response. I'm really loving the P3esr's at the moment. Initially, I was not impressed by the bass response, but things have improved considerably after around 200 hours of listening. These speakers are definitely keepers. Once you get used to the midrange magic, it's hard to enjoy other speakers. I'm really hoping the Cronus Magnum will take things up a notch or two.
I drive my P3ESRs with an ARC VSi55 integrated, which has 50 watts per channel.  More than enough power.  Your Rogue piece should do fine with them.  Adding a small subwoofer like one of SVS' smaller models will really enhance your listening experience.
I finally made the purchase yesterday! Happy to report that the improvement in SQ is substantial. I just can't believe how much bigger and better the Harbeth's are sounding right now. I'm finally beginning to see why people love the P3esr's so much. Without a doubt the Cronus Magnum has taken my music to a whole new level. 

Ok now that I have the basics (amp + speakers) under control, I'm trying to see what improvements I can pursue going forward. Let me share what I think those areas should be, as well as my concerns …

Apple TV -- I'm currently using Apple TV as a streamer. Some folks have suggested moving up to a more purpose-built device like the Bluesound Node. My question is if it's worth the price if I already use a DAC (Cambridge Audio Azur 851D) which is (subjectively) better than the one found in the Bluesound. So if you take the DAC out of the equation, is it worth spending money on the Bluesound purely as a streamer? 

DAC -- Should I look into upgrading my DAC first? The Azur 851D is a good DAC, but it's about 4 years old now. I wonder if there are better DACs out there that might noticeably improve the sound quality? I don't mind spending up to $2000 for a used device, but cannot justify anything higher. Or should I stay with my current DAC?

Subwoofer -- Several of you have suggested adding a subwoofer. For now, I'm happy with the bass response I'm getting. Besides, I've never had any luck integrating a sub with my KEF LS50 wireless. I can never tune it to my satisfaction. But let's say it's worth trying, what would you guys recommend? My preference is to have something that is musical, sealed and with a small footprint.

Cables -- I'm currently using silver wires (Clear Day) -- btw, I recently found out that Paul (the owner) has passed away. May he rest in peace. He was a fantastic guy and spent at least two hours on the phone with me a few years ago before I made the purchase. Having said that, I wonder if silver cables are the best option here. Suggestions?

Lastly, given that I will be making one change at a time as funds permit, it would be helpful to lay out a rough roadmap in terms of priority.