My parents faced this decision around 30 years ago. They were passionately opposed to selective education but they had two very academic daughters and we lived on the doorstep of one of the most successful super-selectives in the country.
They chose the local comp. It's my view that DSis and I had a fantastic education at that school. We were stretched academically and encouraged to fly. We both came out with better grades than our respective friends from primary, who went to the super-selective, and we both ended up with good Oxbridge degrees.
I firmly believe that bright kids can be taught well in the comprehensive system. I also believe - because I've seen it happen - that some kids only blossom several years into the secondary system, when it's too late to pass the 11 plus. And others, who are pushed at primary in order to get into the grammar, just end up miserable and struggling because they can't keep up. And then, what about the others who are tremendously talented in one area of the curriculum but decidedly average in others?
Segregating kids is not the answer. Good differentiation and flexible setting by ability is helpful, however.
My dd is so-called gifted and talented in all things academic. Not so for art and PE. I would never want to send her to a selective school and deliberately chose to live in an area with no state selectives (can't avoid the private sector!). So in answer to your question, OP, no, I wouldn't choose a grammar for my DC.