Rsasso,
With 75 watts/ch, you can drive most of the speakers available. It would help for you to describe the type of music you listen to, then others can make better suggestions.
As offered above, tubes are happier when the impedance curve is pretty flat, so you might read some reviews that offer those measurements. For example:
http://www.soundstagemagazine.com/measurements/silverline_panatella_ii/
Good luck.
With 75 watts/ch, you can drive most of the speakers available. It would help for you to describe the type of music you listen to, then others can make better suggestions.
As offered above, tubes are happier when the impedance curve is pretty flat, so you might read some reviews that offer those measurements. For example:
http://www.soundstagemagazine.com/measurements/silverline_panatella_ii/
Good luck.