Col,

many thanks again for your kindness and patience.
What I have found incredibly useful from these two audio clips are the differences between the different speakers. Given that Focusrite has quite a reputation for making great products, used in the best recording studios (like Abbey Road), one can trust them for being able to reproduce the sonic features of these different monitors.
Actually, after listening to your two recordings, I have included the KRK RP5 in my final selection, together with the Adam AX7.

KRK RP5




And, speaking of Focusrite, I will most likely buy one of their sound interfaces: either the Scarlett 18i8 or the Scarlett 18i20






As always, the key is not finding the best product of all, but the one that best satisfies our needs.