"equally impeccable" is correct and usable in written English.
You can use it to describe someone or something that has a very high standard of quality. For example, "Her cooking skills were equally impeccable, and her desserts were particularly delicious."
Her portrayal of Mrs. Thatcher in power, while equally impeccable, is limited by the film's vague and cursory treatment of her political career.
Sleater-Kinney's career has followed a sort of template for the indie-rock-band trajectory: its first album was on a tiny independent label, followed by releases on larger ones with equally impeccable credentials, Kill Rock Stars and Sub Pop.
Martin's famous string-quartet arrangement for "Yesterday," perhaps the most famous string arrangement of its period, is equally impeccable: a classical-minded music perfectly accenting a classical-minded song.
The present-day romance involves two young researchers, an American graduate student named Roland Michell Aaron Eckhartt) and a British junior professor named Maud Bailey (Gwyneth Paltrow, her hair drawn back into an impeccable bun and her syllables shaped into an equally impeccable over-educated upper-middle-class English accent).
Jen tests and retests her recipes to make sure they work perfectly, and her camera skills are equally impeccable.
WasabiSabi 227a London Rd, Sheffield, tel: 0114 258 5838 A good and popular restaurant, consistently praised for sushi that's second to none, and equally known for its impeccable service.
His finger-work was impeccable, while equally authoritative was his ability to maintain the music's tonal quality and shape while effortlessly steering his way around some technically awkward corners in the B-flat concerto, as well as the far more virtuosic writing encountered in the Emperor.
He could be a highly comic writer - and an equally comic speaker, with an impeccable sense of timing - even when the issues were of the utmost gravity.
Mr. Mead made an equally strong impression with his luminous voice, impeccable control and expressive phrasing.
The pedagogical approach of his HHMI-funded program is equally rare; rather than selecting research students with impeccable academic credentials, Warner's program admits only students with grade point averages between 2.5 and 3.0.
Equally impressive were the novels and stories of Peter Taylor, an impeccable Social Realist, raconteur, and genial novelist of manners who recalled a bygone world in works such as The Old Forest (1985) and A Summons to Memphis (1986).
