What we like and how something sounds is unique and personal, and every room and situation is different, so is a bit difficult to predict what you’ll like. I’d expect a significant upgrade in overall sound quality and refinement from a change to higher end gear such as you described, but there’s no guarantee you’ll like every aspect. Speakers and room typically have the most impact, but at some level all of it matters. Placement and setup are important with any system, but likely more so with a higher end system to truly unleash all the potential. At some point you’ll also reach diminishing returns per dollar spent, either with the gear, and/or what you’ll appreciate...only you can determine where that line is.
I assume the room will be the same, so if untreated or problematic, the higher end gear may have untapped potential that gets masked, but if should give you more incentive to keep plugging away at the gremlins and weak links of your system. ...Audio can be as much of a journey as it is a destination...sometimes a life long journey without a clearly known ending, so enjoy the trip.