I had the Rotel RB-1070 with my 1.6s for only a few months. It simply didn't have the guts. I liked the Rotel 'house sound' and had I bought the model up, the RB-1080 I may still own one.
The 1070 has no factory 4 ohm power rating, though the bridged mono rating into 8 ohms implies a 4ohm power of about 180 a side.
While many panel owners like the 'd' amps, you can't go wrong with any of the mentioned amps.
Time for an audition? How long is 'a while'? I'd be reluctant to let any electronics sit for more than say......a year, before using.