Hi RB. My DS is at JHGS and likes it (as much as he could ever like going to school

). He isn't sporty so I will leave someone else to help you on that.
JHGS pastoral support is outstanding. He has seen a couple of bullying incidents, reported them and the school dealt with the incidents quickly. Like RGS, they use an online system so you can see reports/achievements/timetable. From year 8 they are required to have an iPad (unless that has changed).
Communication from the school could be a bit stronger, but I feel that is maybe because they are trying to make them independent young men.
Re. Marlow Hill, I will say again (I'm looking at you G55) that it is not that bad but, coming from North Wycombe, you are going to have problems getting
to Marlow Hill - all the roads into town are solid traffic more often than not. But if you are not driving the school buses usually arrive on time and a lot of children just get a bus into town and then walk up the hill.
I would recommend JHGS as the teaching appears to be excellent and my DS has come on in leaps and bounds. Personally in your location I would go for RGS but JHGS is a wonderful school that I am happy to have my DS attend.
Good luck with your visit and decision. BBB