Joyfull, I applaud you! NICE avatar pic or more like nice body to have to be picutred!!
My body shape is different. I'm all legs. My obliques bulk because I have a regular torso. When I work them, they bulge since there's no room for them to sit inside my rib cage. You, obviously, are better proportioned.
I learned. I should not advise others without disclaiming each body is different.
So to go back to the OP's Q...My answer would be, so long as your back is not riddled with disc problems or whatever, do weighted reps and you'll reduce your # of reps, thus saving time at the gym. Just keep your spinal health in check.