I had the same dilemma a few years ago for DS1...I got some very interesting responses! I second the advice to go for the one with the easiest commute...we did and chose KEGS for that reason. My son does after school clubs 3 to 4 nights per week now he's in year 9 and he loves it. He would not have had this option at any of the other grammars even though I may have preferred them and I'm especially pleased we don't all have to get up at the crack of dawn to ensure he's on a very early bus to school. As an added thought, he broke his foot last year and needed to be taken to and from school for 6 weeks which would have been utterly impossible at any of the other schools, this happening did not even enter my head when we were considering schools but it could happen. Then there's the odd trip in when they call you with a desperate plea to take in their forgotten homework or PE kit....I know parents who have made 2 hour plus round trips to Southend on these occasions! PM me if you want any specific info about KEGS.
Thanks Bikkigirl, we will be moving to a sensible proximity to any of the school choices if need be taking into account work commute and other family commitment. I will take up your offer as per PM to know more about KEG's. We have also called CRGS and have been told we can come along tomorrow to Sixth Form Open evening and have a Tour around the school as opposed to the information evening on Wednesday/Thursday- as these are not detailed visit of the school.