Thanks for the input guys! I looked up the price on those Cherry Bombs and I think it would be at least worth trying. I could get two for around $50. With all the other expenses I have on this project right now that price is right.
At that cost I could always swap them out down the road if it's not the sound I'm looking for. Since I don't have cats I wonder how loud the Flowmasters would be. I guess if I have to try a few till i find the right sound, it's only money, I can make more...