Would it be beneficial to just go all out and do the receiver and amp? From what I’ve read it seems like you can either dish out some $$$ for a high end receiver or buy a decent receiver and then use the extra $$ to buy an amp.
If you compare the impedance and phase angle graphs of the V2, and V3, and since the specs of the V4 look very similar to that of the V3, it would be reasonable to assume the V4 has similar impedance and phase angle measurements too.
Unfortunately that would mean the V4 is more like a 4 ohm speaker.
So it depends on your seating distance, spl you listen to, and how much headroom you wish to have on hand, you may or may not benefit from an external power amp assuming you are getting a new AVR that has multi-channel preamp outputs.
As to "high end" receiver, I have no idea what you would consider "high end". Regardless, subjective reviews are subjective, often not based on measurable performance. If you go by actual bench test measurements, you should take a look of the review at ASR.
This is a review and detailed measurements of the Denon AVR-X8500H Flagship 13.2 Audio/Video Receiver (AVR). It is kindly loaned to me by a member and costs US $3999. The 8500H is a beast: it is both deep and heavy. Thankfully the transformer is centrally located so as manageable as 51...
www.audiosciencereview.com
And you will see that there currently 4 Denon receivers in the top 10 measured there so far, rank by the preamp output's THD+N at 2 V using digital inputs.
Even the $6,600 NAD separate preamp/processor (I would consider it "high end") did not make it to the top 10 (it did manage 11
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Sidebar 3: Measurements The big Paradigm's sensitivity weighed in at 89.5dB(B)/2.83V/m, 1dB more sensitive than the earlier version we reviewed three years ago. This is within the margin of error of the older speaker but is still almost 3dB higher than average. The impedance, however, drops...
www.stereophile.com
Sidebar 2: Measurements
www.stereophile.com