I have jumped deer on the way to my stand, knowing I am sighted in at 25yards gives me enough confidence shooting from 15-35 on the ground(practice). But I also know 99% of my hunting is done from a tree. My set up has evolved every year, currently I shoot CX 300's which are about 400grs total with 100gr head(Muzzy 3 blade) and a Muzzy Zero Effect rest. Unfortunately every change costs $$$ sorry to say. I know in my case one change has always lead to another. This year I bought a fixed pin sight for the off season so I could practice shooting at 50-60 yards. I would NEVER take a shot that far at a live animal but it makes shooting one at 30 seem a whole lot easyer... As for the Trophy Ridge set up sounds like a real good combo! Also if you do change to a lighter arrow what you loose in wieght you gain in speed so your KE is going to be close to what you are now.
(Now I did it, opened a big can of worms)
Good luck with which ever way you choose to go.