The phrase "with an eye for" suggests a keen and discerning perception or an ability to perceive something that others may miss. Some synonyms for this phrase include "with a discerning eye," which conveys a similar sense of astuteness and acuity; "with a sharp eye," which emphasizes keen perceptiveness; and "with a watchful eye," which suggests a sense of vigilance and attention to detail. Other possibilities include "with a skilled eye," "with a trained eye," and "with a critical eye," all of which suggest a level of expertise or a capacity for careful evaluation. Whatever the phrase used, these synonyms indicate an ability to see beyond the surface and perceive the nuances of a given situation.