Congratulations. "Warmth" is dependent on many variables in your equipment chain. There is a discussion on another thread whether monoblocks vs stereo amps worth it.
I would recommend getting comfortable with the sound , especially since you are enjoying it. You can experiment w/ placement, room treatments, etc and may be surprised.
Also, I believe you have tone controls on your Mac so would experiment with those.
Look around here. There is a wealth of information.
Good luck.