Here's a video of mine at cold start. I did this especially for you! Thought I would give you an example of what a catless DP, no resonator, and a Magnaflow sounds like. It's loud! Shakes my old house when I start it in the garage. The dishes rattle so much in the kitchen cupboards it sounds like a 7.0 quake.
Idle is pretty subdued but WOT is ear drum bursting.
I say take it off. If you don't like it, put one back on. You'll never know till you try?