Cherry-pick

entresacar

(to select only the best from a range of options)

escoger la crema

(to select only the best from a range of options)

escoger selectivamente

(to select only the best from a range of options)

mirar con lentes de aumento

(to select only evidence which supports an argument, and reject or ignore contradictory evidence)

seleccionar la cereza

(to select only the best from a range of options)