How confident are you that your speakers and listening seat are in the right places? The tonal balance issues you describe can be altered by addressing how the speakers are reacting to the room and where you are sitting.
Start with sitting in the spot which has the smoothest bass. Then work with the speakers. This will cost you nothing. If you still have the issues you describe, then consider equipment changes.
Start with sitting in the spot which has the smoothest bass. Then work with the speakers. This will cost you nothing. If you still have the issues you describe, then consider equipment changes.