This year, I bought a 3.84 TB Solidigm (formerly Intel) D7-P5520:
The primary trend that is easy to see across a wide range of tests is that the Solidigm P5520 offers exceptional performance and very low latency across the board.
www.storagereview.com
I'm still buying parts for the machine it's going into, so I have no personal observations or data to add about its performance on client workloads. Anyway, I don't game so I can't comment on how well it'd work for that. I'd be curious to know how it would handle something like Starcraft, with its industry-leading tail-latencies!
I bought mine here:
Get Fast Service & Low Prices on SSDPF2KX038T1N1 Solidigm SSD D7-P5520 Series (3.84TB, 2.5 inch PCIE 4.0 X4, 3D4, TLC) and Much More at PROVANTAGE.
www.provantage.com
One downside is that most consumer motherboards will require an adapter of one sort or another. However, the biggest downside is probably its high idle power of 5 W. That's pretty typical of enterprise SSDs, it seems, but much higher than consumer SSDs. Because of that, I think you really ought to mount it directly behind a front intake fan, rather than on one of those PCIe AIC host cards.
It's a shame you dropped the p5800x from these comparisons (and even the 900p/905p). I understand they're not made anymore
You can still buy them. Believe it or not, this is about half what they cost, compared to 1 year ago.
Get Fast Service & Low Prices on SSDPF21Q400GB01 Intel Optane SSD DC P5800X 400GB 2.5" PCIe x4 NVMe 3D XPoint and Much More at PROVANTAGE.
www.provantage.com
I would still recommend the D7-P5520, though. Roughly 10x the capacity for about half the cost, and you still get good enough QD1 and tail latencies low enough that most people will never notice the difference. Lower power consumption, too.