[Hoggaphobia]

I am looking at a new bow -- A PSE Firestorm Lite. I found one online for a really good price, but it is only a 60 lb draw. I wanted one with a 70 lb. So, being a new hunter, I need to know if there is anything specific that I should ask. Also, how much difference is there in KE or in FPS with the 10 pound drop in draw?

Thanks