More draw weight means more speed (which is a good thing), but accuracy is the most important factor. If 70# is a struggle and negatively affects your accuracy, stick with 60#. If not, go for it. Mathews' Switchweight mods allow you to try out a wide range of draw weights fairly cheaply.
If you lighten your arrows to around 520 gr, you should get around 265 fps at 33.5"/60#, which is plenty for whatever you want to hunt.