Aside from tube amps, Triangle's work best with SS amps from Audio Analogue, Cairn, Audio Refinement, and Unison. But, if your SS amp is not known to be "tube-sounding," you can compensate by partnering it with a smooth sounding CDP like a Rega Planet or a Cambridge Audio D500SE.
Your amp alone should work well with the Triangle's. NAD's sound is not known to be typical "solid-state" sound. However, Sony CDP's are not known to be smooth sounding but I do like one Sony CDP which I currently own - a DVP-S9000ES... and guess what, I use it with Triangle Titus'! So, if the sound of your CDP is close enough with the 9000ES, then no problem. The amplification I use is an Audio Analogue Puccini. The Triangle's have superb speed, imaging, and soundstaging (compared to Wharfedale Diamond 8.1's which they replaced).
Your amp alone should work well with the Triangle's. NAD's sound is not known to be typical "solid-state" sound. However, Sony CDP's are not known to be smooth sounding but I do like one Sony CDP which I currently own - a DVP-S9000ES... and guess what, I use it with Triangle Titus'! So, if the sound of your CDP is close enough with the 9000ES, then no problem. The amplification I use is an Audio Analogue Puccini. The Triangle's have superb speed, imaging, and soundstaging (compared to Wharfedale Diamond 8.1's which they replaced).