
Depending on the resistence and sensitivity of your headphones, you can try the Fiio JA11. They got PEQ via a webUSB aswell.
Some people have reported issues on certain phones. But most seem to be fixed by now and mine work great. Maybe just check for issues, before you go for the plunge.
Depending on your setup, budget and location, Nubert makes some nice speakers. I’m pretty happy with my A-125 and a XW-900.
They also make a soundbar (AS-225) that uses the same drivers but reaches low enough to eliminate the need for a subwoofer.