Look at the Marantz Reference integrated line as well as the newest line of Yamaha integrated gear. These two fit your criteria, save for the power you'd like. As others have said, try more efficient speakers or see if you can get a try out/return program like Music Direct offers. It's where I got my Marantz gear from. They are great to deal with.
All the best,
Nonoise
All the best,
Nonoise