I did some actual operating on 40 meters using the Airspy as the receiver today.
I did A/B/C comparisons on weak signals and strong signals between my homebrew RX (my benchmark) the Flex 3000 and the Airspy.
If I turned the preamp on the airspy off, it was as good as the others, the 3000 might have a bit more background noise.
With the preamp on, the noise level comes up slightly to equal the Flex 3000.
Strong signals just out of the filter passband did not impact the signal listened to, even just 50 Hz out of the filter passband.
The noise reduction in the airspy or is it SDR sharp program? rocks!
Impulse noise can be eliminated and its easy to use.
You have AF, IF and Broad Band blanker's and reduction, the IF noise blanker works well on my noise.
On AM you have an interesting and very well working sync AM or ECSS type stuff, its tagged lock carrier and anti-fading.
It does not seem to squeal on lockup like most do.