First question is why one would need to move power amps other than when they are first installed....can't think of any good reason, but you could always invest in some amp stands with casters.
I tend to prefer Class A and Class B with big power supplies, so I have four amps over 100 lbs. in use (and another backup that is only about 70 lbs.) As I almost never need to move them, the weight is never an issue.
Having said that, the power amp in my main system right now is a tube amp that weighs only about 50 lbs. - maybe that is a way you could go....
I tend to prefer Class A and Class B with big power supplies, so I have four amps over 100 lbs. in use (and another backup that is only about 70 lbs.) As I almost never need to move them, the weight is never an issue.
Having said that, the power amp in my main system right now is a tube amp that weighs only about 50 lbs. - maybe that is a way you could go....