Yeah, 60 LBS is also as heavy as I want to go.
My Yamaha MX-A5000 is about 60 LBS.
I lifted up the AT527NC a few days ago, and it felt pretty heavy - probably heavier than I like.
The Legacy Audio PowerBloc4 (4Ch amp, 325W-8ohm/650W-4ohm) is 19 LBS. Legacy is coming out with a MCH amp (not sure if it's 5Ch or 7Ch or more). Hopefully it's no more than 30 LBS.