RE: How often should you upgrade with a new bow?
bigbulls and I often agree on many things. On this one, maybe not. I'd say that if you are comfortable with your bow then keep it. With that kind of speed you will be spending a lot of money for nothing is that is one of your goals. It doesn't matter whether you get a new bow or not you still need a new rest and a new sight. Probably money you will spend outfitting the new bow. So get them now for the Reflex. They can always be moved to a new bow later. String? Depending on what you get (I'd estimate about $30) a new string is tons less expensive than a new bow, and necessary anyway.
Do some homework on the AlphaShox. Can't remember where I got the info but they don't work on some bows. Just make sure they fit on the Reflex.