The NAD 3130 is a 30wpc amplifier I believe. If I am correct you will need a speaker that is not to difficult to drive. With the small room, I would be more concern with impedance aspect than sensitivity. That said, I would look for a speaker not being lower than 87dB sensitive.
The Silverline Minuets suggested by Soix would be a good choice.
The Silverline Minuets suggested by Soix would be a good choice.