my question is this, what would be the best combination of Carbon arrows and Broad heads to get a RESPECTABLE KE with my set up?
No matter what you pick your KE will roughly basically be the same. What you want is the best setup to USE the KE your bow produces.
I would recommend - Super Carbon Magnums 55/70 or Gold tip XT's 55/75 with the new Nap Nitron Head