Unlikely that an amp change will make a substantial or fundamental change. But if you're sensing something is missing consider acoustical treatment for your room. That can make a staggering improvement in your listening experience for a relatively small investment.
In my living room, which has a lot of glass on 3 sides and no possibility of curtains, we used 2ft2 2" panels on the ceiling to try and tame things down. Even covering less than 50% of the area, we noticed a huge improvement in sound quality, as well as a quieter environment overall. In the music room/theater, a full room package with bass traps was installed, and even casual visitors notice the sound quality is great.
