Jesus Pimentel asks:

>Can anyone give me a suggestion on a good recording for Scarlatti's
>sonates,...

Horowitz & Landowska are probably the most important recommendations.
But there is some by Leonhardt too and I like Huguette Dreyfus.  On piano
I think Haskil needs to be mentioned and fans of Andras Schiff won't be
disappointed by him in this repertoire.

Philip Peters