A lot will indeed work. I have absolute confidence in my Beman MFX Classics. I was shooting 4 pounds less than you in draw weight last year on whitetails pllus a "bit" of dirt on the off side.
That arrow:
X-Nock
3, 4" feathers
600 spine
28"
75 Grain Insert
100 Grain Helix single bevel
Weighed (from memory--414 grains)
For your higher draw weight and longer draw I'd be looking at 500 Spine.
I may use 500 spine this season with 100 grain insert + 125 grain Helix. This will boost my arrow weight to nearly 500 grains, still using 47# recurves. I'm not changing for any reason other than change however I do expect a slightly more quiet set-up but frankly, my ears can't tell the difference.
Then again, since it appears I'll not be headed west this year and anything bigger than whitetails, I should simply stick with last year's set-up.
I find Stu's Calculator the perfect gaming tool.