yes, and i like Krell..
Emotiva seems popular though.
http://emotiva.com/xpa3.shtmthey are having their 4th of july sale until the 18th, for 500$ for a 300W at 4ohm 3 channel that might be a good idea.
or
http://www.audiogon.com/cgi-bin/cls.pl?ampsmult&1282675373&/Krell-250a/3-more, but its 500W at 4ohms.
you will NOT get better sound quality, but it will enable you to play louder and when watching a movie the extra power will help with the sudden loud parts of the movie.
i have m60's and use to have a 135w per channel amp, and during movies that amp would be driven into clipping from time to time, with more powerful amps i don't have that problem anymore.