RE: What arrow should I buy???
I use the HIT inserts. I shoot Easton Axis STs and I recently got some of the Beman MFX ST arrows. I have been shooting ST arrows for 3 years and see no reason to change. I would recommend them if they are in your price range. Check the Easton chart to find out for sure but I believe a 340 spine is what you need. Also, you said you "think" your DW is 70#s. Get to a bow scale and find out for sure. Its important to know to get the properly spined arrow.