Bob,
I don't agree with 500s.
I have set up some Easton 400s for my new Gamemaster that is 54# at my 30 inch draw. The arrows are 31.25" with 145 grain points and bareshaft perfectly. A 30.5" GT 500 with 85 grains is REALLY weak bareshafted. At 30" thay are not much better. The 500s fly great out of my Great Plains B-Model TD that I draw to 48# at 30 inches.
You are in the middle. I am currently working on some 400 Beman Hunters that I am going to use either 50gr. or 100gr. inserts on and then tune the point weight to get to about 480gr. at 30.5 inches. I expect to have about 200 grains up front.
I suggest the Carbon Express CX200 if you don't go with the Arrow Dynamics. The spine on that CE shaft is .458 and would be right in the sweet spot. They are pretty light at 7.3gr./in. but if you put a 100 grain insert in and then tune the point you should get to 450-480 grains total. High FOC carbon arrows fly really well.
Kevin