Welcome to the forum and thanks for your detailed assessment with your first post! I've got the 2.4L model also and feel like it's got plenty of get up and go, especially in Sport mode.
Yeah it's buttery smooth. Honda has perfected the J35 V6. They've been making it for many years now.I've driven both and obviously I went wit the V6.... to me I found the 2.4 lacking the umph I wanted. No right or wrong here... but I'm totaly happy with the V6, never field it too heavy and esp on the highway it moves most satisfactory. I personally don't enjoy needing 5000 RPM to feel the speed but I will say when the V6 jumps in RPMS you felt it for sure and this engine in so smooth an quiet.