Hi, I am a new member to this forum. I am also new to Nuprime/class D audio. Being an engineer, I thought, ‘there has to be something better than room heaters ie valve gear ‘ esp. when I am already living in the tropics. Well, I bit the bullet and purchased the sta-9. It’s been a year of thoroughly enjoying the amp every time we play it. It sounds great, it’s detailed and it runs relatively cool - what’s not to like it? But out of curiosity, if I want to upgrade it, which power amp is suitable for a guy who listens to most genre, classical to rock and jazz and has B&W 706 s2 speakers. Should it be the nuprime AMG or the st-10?