If you can get a note 9 for that price then you should do it without too much thinking. You should really try s9 / note 9 by yourself. They are good enough for low impedance. V30 / V30+ is a good phone pretty much only SQ wise. Can't recommend it for anything else. If your pc got a type C port then I suggest to buy the apple type C dongle for 10 eur and try it with your gear. It got quite the incredible measurements and unless you need to drive really high impedance it might be loud enough. I consider most of the stuff in this thread to be audiophile BS, I can only suggest to try the stuff yourself.