Best measuring preamp indeed and credit to where credit is due. But unfortunately not for me. I will not use a preamp where I will need to cycle through inputs with a tiny button, be it on the unit itself or the remote. And I will not apologize for nagging about this with the hope that manufacturers such as Topping would eventually listen.
Because of ASR, manufacturers such as Topping have become obsessed with measurements and it has become a product drag race. Yes, it's awesome to have a car that does a quarter mile in 10 seconds, but I need it to have AC and automatic transmission too. Yes I am belaboring this and have started to use car analogies so I better end here.