To figure out the kinetic energy of your arrow, this is the formula;
fps2 X Weight of Arrow / 450,240 = Arrow’s Kinetic Energy
In your case;
290fps x 290fps x 385gr = 32,378,500
32,378,500 / 450,240 = 71.91 ft-lbs of Kinetic Energy
If you want to do it the easy way, there is an archery calculator at backcountrybowhunting.com
To answer your original question, use whichever broadhead flies the truest out of your bow as both will work just fine.
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