As mentioned above, the difference between a "low" powered receiver and a "high" powered receiver is pretty close to meaningless. If you heard a difference between two mass market receivers in terms of sonics then I'm here to tell you those differences weren't caused by the equipment. They were caused by your own biases or by a failure to level match the products side by side.
The truth is all home receivers are overpowered for a typical home installation. But if you want a meaningful amount of additional power then get a few of these. They won't sound any different than what you had but they may make you feel better about things. They produce 350 watts per channel into 8 ohms. You need three. The center channel one can be bridged - that's 850 watts.