P, welcome. You haven't given us an adequate description of your hair so that we can precisely analyse the technical specs necessary to meet your stated requirement.
However, in the meantime, if you presently have a receiver with a rating anywhere in the 100 watt area you might try that first before planning for a replacement. Yes, factors such as room size and more importantly listening distance would be helpful if described. As a generality, well-featured and powerful units such as the Denon 3808 and Onkyo 876 should be considered.
